diff --git a/modules/adoceanBidAdapter.js b/modules/adoceanBidAdapter.js
new file mode 100644
index 00000000000..6f6548a1ba8
--- /dev/null
+++ b/modules/adoceanBidAdapter.js
@@ -0,0 +1,164 @@
+import { _each, isStr, isArray, parseSizesInput } from '../src/utils.js';
+import { registerBidder } from '../src/adapters/bidderFactory.js';
+import { BANNER, VIDEO } from '../src/mediaTypes.js';
+
+const BIDDER_CODE = 'adocean';
+const URL_SAFE_FIELDS = {
+  slaves: true
+};
+
+function buildEndpointUrl(emitter, payloadMap) {
+  const payload = [];
+  _each(payloadMap, function(v, k) {
+    payload.push(k + '=' + (URL_SAFE_FIELDS[k] ? v : encodeURIComponent(v)));
+  });
+
+  const randomizedPart = Math.random().toString().slice(2);
+  return 'https://' + emitter + '/_' + randomizedPart + '/ad.json?' + payload.join('&');
+}
+
+function buildRequest(bid, gdprConsent) {
+  const emitter = bid.params.emitter;
+  const masterId = bid.params.masterId;
+  const slaveId = bid.params.slaveId;
+  const payload = {
+    id: masterId,
+    slaves: ""
+  };
+  if (gdprConsent) {
+    payload.gdpr_consent = gdprConsent.consentString || undefined;
+    payload.gdpr = gdprConsent.gdprApplies ? 1 : 0;
+  }
+
+  if (bid.userId && bid.userId.gemiusId) {
+    payload.aouserid = bid.userId.gemiusId;
+  }
+
+  const bidIdMap = {};
+  const uniquePartLength = 10;
+
+  const rawSlaveId = bid.params.slaveId.replace('adocean', '');
+  payload.slaves = rawSlaveId.slice(-uniquePartLength);
+
+  bidIdMap[slaveId] = bid.bidId;
+
+  if (bid.mediaTypes.video) {
+    if (bid.mediaTypes.video.context === 'instream') {
+      if (bid.mediaTypes.video.maxduration) {
+        payload.dur = bid.mediaTypes.video.maxduration;
+        payload.maxdur = bid.mediaTypes.video.maxduration;
+      }
+      if (bid.mediaTypes.video.minduration) {
+        payload.mindur = bid.mediaTypes.video.minduration;
+      }
+      payload.spots = 1;
+    }
+    if (bid.mediaTypes.video.context === 'adpod') {
+      const durationRangeSec = bid.mediaTypes.video.durationRangeSec;
+      if (!bid.mediaTypes.video.adPodDurationSec || !isArray(durationRangeSec) || durationRangeSec.length === 0) {
+        return;
+      }
+      const spots = calculateAdPodSpotsNumber(bid.mediaTypes.video.adPodDurationSec, bid.mediaTypes.video.durationRangeSec);
+      const maxDuration = Math.max(...durationRangeSec);
+      payload.dur = bid.mediaTypes.video.adPodDurationSec;
+      payload.maxdur = maxDuration;
+      payload.spots = spots;
+    }
+  } else if (bid.mediaTypes.banner) {
+    payload.aosize = parseSizesInput(bid.mediaTypes.banner.sizes).join(',');
+  }
+
+  return {
+    method: 'GET',
+    url: buildEndpointUrl(emitter, payload),
+    data: '',
+    bidIdMap: bidIdMap
+  };
+}
+
+function calculateAdPodSpotsNumber(adPodDurationSec, durationRangeSec) {
+  const minAllowedDuration = Math.min(...durationRangeSec);
+  const numberOfSpots = Math.floor(adPodDurationSec / minAllowedDuration);
+  return numberOfSpots;
+}
+
+function interpretResponse(placementResponse, bidRequest, bids) {
+  const requestId = bidRequest.bidIdMap[placementResponse.id];
+  if (!placementResponse.error && requestId) {
+    if (!placementResponse.code || !placementResponse.height || !placementResponse.width || !placementResponse.price) {
+      return;
+    }
+    let adCode = decodeURIComponent(placementResponse.code);
+
+    const bid = {
+      cpm: parseFloat(placementResponse.price),
+      currency: placementResponse.currency,
+      height: parseInt(placementResponse.height, 10),
+      requestId: requestId,
+      width: parseInt(placementResponse.width, 10),
+      netRevenue: false,
+      ttl: parseInt(placementResponse.ttl),
+      creativeId: placementResponse.crid,
+      meta: {
+        advertiserDomains: placementResponse.adomain || []
+      }
+    };
+    if (placementResponse.isVideo) {
+      bid.meta.mediaType = VIDEO;
+      bid.vastXml = adCode;
+    } else {
+      bid.meta.mediaType = BANNER;
+      bid.ad = adCode;
+    }
+
+    bids.push(bid);
+  }
+}
+
+export const spec = {
+  code: BIDDER_CODE,
+  supportedMediaTypes: [BANNER, VIDEO],
+
+  isBidRequestValid: function(bid) {
+    const requiredParams = ['slaveId', 'masterId', 'emitter'];
+    if (requiredParams.some(name => !isStr(bid.params[name]) || !bid.params[name].length)) {
+      return false;
+    }
+
+    if (bid.mediaTypes.banner) {
+      return true;
+    }
+    if (bid.mediaTypes.video) {
+      if (bid.mediaTypes.video.context === 'instream') {
+        return true;
+      }
+      if (bid.mediaTypes.video.context === 'adpod') {
+        return !bid.mediaTypes.video.requireExactDuration;
+      }
+    }
+    return false;
+  },
+
+  buildRequests: function(validBidRequests, bidderRequest) {
+    let requests = [];
+
+    _each(validBidRequests, function(bidRequest) {
+      requests.push(buildRequest(bidRequest, bidderRequest.gdprConsent));
+    });
+
+    return requests;
+  },
+
+  interpretResponse: function(serverResponse, bidRequest) {
+    let bids = [];
+
+    if (isArray(serverResponse.body)) {
+      _each(serverResponse.body, function(placementResponse) {
+        interpretResponse(placementResponse, bidRequest, bids);
+      });
+    }
+
+    return bids;
+  }
+};
+registerBidder(spec);
diff --git a/modules/adoceanBidAdapter.md b/modules/adoceanBidAdapter.md
new file mode 100644
index 00000000000..c7b55ddc5c3
--- /dev/null
+++ b/modules/adoceanBidAdapter.md
@@ -0,0 +1,58 @@
+# Overview
+
+Module Name: AdOcean Bidder Adapter
+Module Type: Bidder Adapter
+Maintainer: prebid@gemius.com
+
+# Description
+
+AdOcean Bidder Adapter for Prebid.js.
+Banner and video formats are supported.
+
+# Test Parameters Banner
+```js
+    var adUnits = [
+        {
+            code: 'test-div',
+            mediaTypes: {
+                banner: {
+                    sizes: [[300, 200]]
+                }
+            },
+            bids: [
+                {
+                    bidder: "adocean",
+                    params: {
+                        slaveId: 'adoceanmyaotcpiltmmnj',
+                        masterId: 'ek1AWtSWh3BOa_x2P1vlMQ_uXXJpJcbhsHAY5PFQjWD.D7',
+                        emitter: 'myao.adocean.pl'
+                    }
+                }
+            ]
+        }
+    ];
+```
+# Test Parameters Video
+```js
+    var adUnits = [
+        {
+            code: 'test-div',
+            mediaTypes: {
+                video: {
+                    context: 'instream',
+                    playerSize: [300, 200]
+                }
+            },
+            bids: [
+                {
+                    bidder: "adocean",
+                    params: {
+                        slaveId: 'adoceanmyaonenfcoqfnd',
+                        masterId: '2k6gA7RWl08Zn0bi42RV8LNCANpKb6LqhvKzbmK3pzP.U7',
+                        emitter: 'myao.adocean.pl'
+                    }
+                }
+            ]
+        }
+    ];
+```
diff --git a/test/spec/modules/adoceanBidAdapter_spec.js b/test/spec/modules/adoceanBidAdapter_spec.js
new file mode 100644
index 00000000000..53a82ec963d
--- /dev/null
+++ b/test/spec/modules/adoceanBidAdapter_spec.js
@@ -0,0 +1,461 @@
+import { expect } from 'chai';
+import { spec } from 'modules/adoceanBidAdapter.js';
+import { newBidder } from 'src/adapters/bidderFactory.js';
+import { deepClone } from 'src/utils.js';
+
+describe('AdoceanAdapter', function () {
+  const adapter = newBidder(spec);
+
+  describe('inherited functions', function () {
+    it('exists and is a function', function () {
+      expect(adapter.callBids).to.exist.and.to.be.a('function');
+    });
+  });
+
+  describe('isBidRequestValid', function () {
+    const bannerBid = {
+      bidder: 'adocean',
+      params: {
+        masterId: 'tmYF.DMl7ZBq.Nqt2Bq4FutQTJfTpxCOmtNPZoQUDcL.G7',
+        slaveId: 'adoceanmyaozpniqismex',
+        emitter: 'myao.adocean.pl'
+      },
+      adUnitCode: 'adunit-code',
+      mediaTypes: {
+        banner: {
+          sizes: [[300, 250]]
+        }
+      },
+      bidId: '30b31c1838de1e',
+      bidderRequestId: '22edbae2733bf6',
+      auctionId: '1d1a030790a475',
+    };
+
+    it('should return true when required params found', function () {
+      expect(spec.isBidRequestValid(bannerBid)).to.equal(true);
+    });
+
+    it('should return false when required params are not passed', function () {
+      const invalidBid = Object.assign({}, bannerBid, {params: {masterId: 0}});
+      expect(spec.isBidRequestValid(invalidBid)).to.equal(false);
+    });
+
+    const videoInscreenBid = {
+      bidder: 'adocean',
+      params: {
+        masterId: 'tmYF.DMl7ZBq.Nqt2Bq4FutQTJfTpxCOmtNPZoQUDcL.G7',
+        slaveId: 'adoceanmyaozpniqismex',
+        emitter: 'myao.adocean.pl'
+      },
+      adUnitCode: 'adunit-code',
+      mediaTypes: {
+        video: {
+          context: 'instream',
+          playerSize: [300, 250]
+        }
+      },
+      bidId: '30b31c1838de1e',
+      bidderRequestId: '22edbae2733bf6',
+      auctionId: '1d1a030790a475',
+    };
+
+    it('should return true for instream video', function () {
+      expect(spec.isBidRequestValid(videoInscreenBid)).to.equal(true);
+    });
+
+    const videoAdpodBid = {
+      bidder: 'adocean',
+      params: {
+        masterId: 'tmYF.DMl7ZBq.Nqt2Bq4FutQTJfTpxCOmtNPZoQUDcL.G7',
+        slaveId: 'adoceanmyaozpniqismex',
+        emitter: 'myao.adocean.pl'
+      },
+      adUnitCode: 'adunit-code',
+      mediaTypes: {
+        video: {
+          context: 'adpod',
+          playerSize: [300, 250],
+          adPodDurationSec: 300,
+          durationRangeSec: [15, 30],
+          requireExactDuration: false
+        }
+      },
+      bidId: '30b31c1838de1e',
+      bidderRequestId: '22edbae2733bf6',
+      auctionId: '1d1a030790a475',
+    };
+
+    it('should return true for adpod video without requireExactDuration', function () {
+      expect(spec.isBidRequestValid(videoAdpodBid)).to.equal(true);
+    });
+
+    it('should return false for adpod video with requireExactDuration', function () {
+      const invalidBid = Object.assign({}, videoAdpodBid);
+      invalidBid.mediaTypes.video.requireExactDuration = true;
+      expect(spec.isBidRequestValid(invalidBid)).to.equal(false);
+    });
+
+    const videoOutstreamBid = {
+      bidder: 'adocean',
+      params: {
+        masterId: 'tmYF.DMl7ZBq.Nqt2Bq4FutQTJfTpxCOmtNPZoQUDcL.G7',
+        slaveId: 'adoceanmyaozpniqismex',
+        emitter: 'myao.adocean.pl'
+      },
+      adUnitCode: 'adunit-code',
+      mediaTypes: {
+        video: {
+          context: 'outstream',
+          playerSize: [300, 250]
+        }
+      },
+      bidId: '30b31c1838de1e',
+      bidderRequestId: '22edbae2733bf6',
+      auctionId: '1d1a030790a475',
+    };
+
+    it('should return false for outstream video', function () {
+      expect(spec.isBidRequestValid(videoOutstreamBid)).to.equal(false);
+    });
+  });
+
+  describe('buildRequests', function () {
+    const bidRequests = [
+      {
+        bidder: 'adocean',
+        params: {
+          masterId: 'tmYF.DMl7ZBq.Nqt2Bq4FutQTJfTpxCOmtNPZoQUDcL.G7',
+          slaveId: 'adoceanmyaozpniqismex',
+          emitter: 'myao.adocean.pl'
+        },
+        adUnitCode: 'adunit-code',
+        mediaTypes: {
+          banner: {
+            sizes: [[300, 250], [300, 600]]
+          }
+        },
+        bidId: '30b31c1838de1e',
+        bidderRequestId: '22edbae2733bf6',
+        auctionId: '1d1a030790a475',
+      },
+      {
+        bidder: 'adocean',
+        params: {
+          masterId: 'tmYF.DMl7ZBq.Nqt2Bq4FutQTJfTpxCOmtNPZoQUDcL.G7',
+          slaveId: 'adoceanmyaozpniqismex',
+          emitter: 'myao.adocean.pl'
+        },
+        adUnitCode: 'adunit-code',
+        mediaTypes: {
+          banner: {
+            sizes: [[300, 200], [600, 250]]
+          }
+        },
+        bidId: '30b31c1838de1f',
+        bidderRequestId: '22edbae2733bf6',
+        auctionId: '1d1a030790a475',
+      }
+    ];
+
+    const bidderRequest = {
+      gdprConsent: {
+        consentString: 'BOQHk-4OSlWKFBoABBPLBd-AAAAgWAHAACAAsAPQBSACmgFTAOkA',
+        gdprApplies: true
+      }
+    };
+
+    it('should send two requests if slave is duplicated', function () {
+      const nrOfRequests = spec.buildRequests(bidRequests, bidderRequest).length;
+      expect(nrOfRequests).to.equal(2);
+    });
+
+    it('should add bidIdMap with correct slaveId => bidId mapping', function () {
+      const requests = spec.buildRequests(bidRequests, bidderRequest);
+      for (let i = 0; i < bidRequests.length; i++) {
+        expect(requests[i]).to.exist;
+        expect(requests[i].bidIdMap).to.exist;
+        expect(requests[i].bidIdMap[bidRequests[i].params.slaveId]).to.equal(bidRequests[i].bidId);
+      }
+    });
+
+    it('sends bid request to url via GET', function () {
+      const request = spec.buildRequests(bidRequests, bidderRequest)[0];
+      expect(request.method).to.equal('GET');
+      expect(request.url).to.match(new RegExp(`^https://${bidRequests[0].params.emitter}/_[0-9]*/ad.json`));
+    });
+
+    it('should attach id to url', function () {
+      const request = spec.buildRequests(bidRequests, bidderRequest)[0];
+      expect(request.url).to.include('id=' + bidRequests[0].params.masterId);
+    });
+
+    it('should attach consent information to url', function () {
+      const request = spec.buildRequests(bidRequests, bidderRequest)[0];
+      expect(request.url).to.include('gdpr=1');
+      expect(request.url).to.include('gdpr_consent=' + bidderRequest.gdprConsent.consentString);
+    });
+
+    it('should attach slaves information to url', function () {
+      let requests = spec.buildRequests(bidRequests, bidderRequest);
+      expect(requests[0].url).to.include('slaves=zpniqismex');
+      expect(requests[1].url).to.include('slaves=zpniqismex');
+      expect(requests[0].url).to.include('aosize=300x250%2C300x600');
+      expect(requests[1].url).to.include('aosize=300x200%2C600x250');
+
+      const differentSlavesBids = deepClone(bidRequests);
+      differentSlavesBids[1].params.slaveId = 'adoceanmyaowafpdwlrks';
+      requests = spec.buildRequests(differentSlavesBids, bidderRequest);
+      expect(requests.length).to.equal(2);
+      expect(requests[0].url).to.include('slaves=zpniqismex');
+      expect(requests[1].url).to.include('slaves=wafpdwlrks');
+    });
+
+    const videoInstreamBidRequests = [
+      {
+        bidder: 'adocean',
+        params: {
+          masterId: 'tmYF.DMl7ZBq.Nqt2Bq4FutQTJfTpxCOmtNPZoQUDcL.G7',
+          slaveId: 'adoceanmyaozpniqismex',
+          emitter: 'myao.adocean.pl'
+        },
+        adUnitCode: 'adunit-code',
+        mediaTypes: {
+          video: {
+            playerSize: [200, 200],
+            context: 'instream',
+            minduration: 10,
+            maxduration: 60,
+          }
+        },
+        bidId: '30b31c1838de1g',
+        bidderRequestId: '22edbae2733bf6',
+        auctionId: '1d1a030790a476',
+      }
+    ];
+
+    it('should build correct video instream request', function () {
+      const request = spec.buildRequests(videoInstreamBidRequests, bidderRequest)[0];
+      expect(request).to.exist;
+      expect(request.url).to.include('id=' + videoInstreamBidRequests[0].params.masterId);
+      expect(request.url).to.include('slaves=zpniqismex');
+      expect(request.url).to.include('spots=1');
+      expect(request.url).to.include('dur=60');
+      expect(request.url).to.include('maxdur=60');
+      expect(request.url).to.include('mindur=10');
+    });
+
+    const videoAdpodBidRequests = [
+      {
+        bidder: 'adocean',
+        params: {
+          masterId: 'tmYF.DMl7ZBq.Nqt2Bq4FutQTJfTpxCOmtNPZoQUDcL.G7',
+          slaveId: 'adoceanmyaozpniqismex',
+          emitter: 'myao.adocean.pl'
+        },
+        adUnitCode: 'adunit-code',
+        mediaTypes: {
+          video: {
+            playerSize: [200, 200],
+            context: 'adpod',
+            adPodDurationSec: 300,
+            durationRangeSec: [15, 30],
+            requireExactDuration: false
+          }
+        },
+        bidId: '30b31c1838de1h',
+        bidderRequestId: '22edbae2733bf6',
+        auctionId: '1d1a030790a476',
+      }
+    ];
+
+    it('should build correct video adpod request', function () {
+      const request = spec.buildRequests(videoAdpodBidRequests, bidderRequest)[0];
+      expect(request).to.exist;
+      expect(request.url).to.include('id=' + videoAdpodBidRequests[0].params.masterId);
+      expect(request.url).to.include('slaves=zpniqismex');
+      expect(request.url).to.include('spots=20'); // 300 / 15 = 20
+      expect(request.url).to.include('dur=300');
+      expect(request.url).to.include('maxdur=30');
+      expect(request.url).to.not.include('mindur=');
+    });
+  });
+
+  describe('interpretResponseBanner', function () {
+    const response = {
+      'body': [
+        {
+          'id': 'adoceanmyaozpniqismex',
+          'price': '0.019000',
+          'ttl': '360',
+          'crid': 'veeinoriep',
+          'currency': 'EUR',
+          'width': '300',
+          'height': '250',
+          'isVideo': false,
+          'code': '%3C!--%20Creative%20--%3E',
+          'adomain': ['adocean.pl']
+        }
+      ],
+      'headers': {
+        'get': function() {}
+      }
+    };
+
+    const bidRequest = {
+      bidder: 'adocean',
+      params: {
+        masterId: 'tmYF.DMl7ZBq.Nqt2Bq4FutQTJfTpxCOmtNPZoQUDcL.G7',
+        slaveId: 'adoceanmyaozpniqismex',
+        emitter: 'myao.adocean.pl'
+      },
+      adUnitCode: 'adunit-code',
+      mediaTypes: {
+        banner: {
+          sizes: [[300, 250]]
+        }
+      },
+      bidIdMap: {
+        adoceanmyaozpniqismex: '30b31c1838de1e'
+      },
+      bidId: '30b31c1838de1e',
+      bidderRequestId: '22edbae2733bf6',
+      auctionId: '1d1a030790a475',
+    };
+
+    it('should get correct bid response', function () {
+      const expectedResponse = [
+        {
+          'requestId': '30b31c1838de1e',
+          'cpm': 0.019000,
+          'currency': 'EUR',
+          'width': 300,
+          'height': 250,
+          'ad': '<!-- Creative -->',
+          'creativeId': 'veeinoriep',
+          'ttl': 360,
+          'netRevenue': false,
+          'meta': {
+            'advertiserDomains': ['adocean.pl'],
+            'mediaType': 'banner'
+          }
+        }
+      ];
+
+      const result = spec.interpretResponse(response, bidRequest);
+      expect(result).to.have.lengthOf(1, 'Response should contain 1 bid');
+      let resultKeys = Object.keys(result[0]);
+      expect(resultKeys.sort()).to.deep.equal(Object.keys(expectedResponse[0]).sort(), 'Response keys do not match');
+      resultKeys.forEach(function(k) {
+        if (k === 'ad') {
+          expect(result[0][k]).to.match(/<!-- Creative -->$/, 'ad does not match');
+        } else if (k === 'meta') {
+          expect(result[0][k]).to.deep.equal(expectedResponse[0][k], 'meta does not match');
+        } else {
+          expect(result[0][k]).to.equal(expectedResponse[0][k], `${k} does not match`);
+        }
+      });
+    });
+
+    it('handles nobid responses', function () {
+      response.body = [
+        {
+          'id': 'adoceanmyaolafpjwftbz',
+          'error': 'true'
+        }
+      ];
+
+      const result = spec.interpretResponse(response, bidRequest);
+      expect(result).to.have.lengthOf(0, 'Error response should be empty');
+    });
+  });
+
+  describe('interpretResponseVideo', function () {
+    const response = {
+      'body': [
+        {
+          'id': 'adoceanmyaolifgmvmpfj',
+          'price': '0.019000',
+          'ttl': '360',
+          'crid': 'qpqhltkgpu',
+          'currency': 'EUR',
+          'width': '300',
+          'height': '250',
+          'isVideo': true,
+          'code': '%3C!--%20Video%20Creative%20--%3E',
+          'adomain': ['adocean.pl']
+        }
+      ],
+      'headers': {
+        'get': function() {}
+      }
+    };
+
+    const bidRequest = {
+      bidder: 'adocean',
+      params: {
+        masterId: 'tmYF.DMl7ZBq.Nqt2Bq4FutQTJfTpxCOmtNPZoQUDcL.G7',
+        slaveId: 'adoceanmyaolifgmvmpfj',
+        emitter: 'myao.adocean.pl'
+      },
+      adUnitCode: 'adunit-code',
+      bidIdMap: {
+        adoceanmyaolifgmvmpfj: '30b31c1838de1e'
+      },
+      mediaTypes: {
+        video: {
+          playerSize: [200, 200],
+          context: 'instream'
+        }
+      },
+      bidId: '30b31c1838de1e',
+      bidderRequestId: '22edbae2733bf6',
+      auctionId: '1d1a030790a475',
+    };
+
+    it('should get correct bid response', function () {
+      const expectedResponse = [
+        {
+          'requestId': '30b31c1838de1e',
+          'cpm': 0.019000,
+          'currency': 'EUR',
+          'width': 300,
+          'height': 250,
+          'vastXml': '<!-- Video Creative -->',
+          'creativeId': 'qpqhltkgpu',
+          'ttl': 360,
+          'netRevenue': false,
+          'meta': {
+            'advertiserDomains': ['adocean.pl'],
+            'mediaType': 'video'
+          }
+        }
+      ];
+
+      const result = spec.interpretResponse(response, bidRequest);
+      expect(result).to.have.lengthOf(1, 'Response should contain 1 bid');
+      let resultKeys = Object.keys(result[0]);
+      expect(resultKeys.sort()).to.deep.equal(Object.keys(expectedResponse[0]).sort(), 'Response keys do not match');
+      resultKeys.forEach(function(k) {
+        if (k === 'vastXml') {
+          expect(result[0][k]).to.match(/<!-- Video Creative -->$/, 'vastXml does not match');
+        } else if (k === 'meta') {
+          expect(result[0][k]).to.deep.equal(expectedResponse[0][k], 'meta does not match');
+        } else {
+          expect(result[0][k]).to.equal(expectedResponse[0][k], `${k} does not match`);
+        }
+      });
+    });
+
+    it('handles nobid responses', function () {
+      response.body = [
+        {
+          'id': 'adoceanmyaolafpjwftbz',
+          'error': 'true'
+        }
+      ];
+
+      const result = spec.interpretResponse(response, bidRequest);
+      expect(result).to.have.lengthOf(0, 'Error response should be empty');
+    });
+  });
+});