Grey Sea Slug

1. Schooner Gertrude de Costa (1950)Imperoyal, Nova Scotia, CanadaBoat · WreckAdvanced+28 mBest Jun–Aug · estimated7 mm / dry
2. Schooner Reaper (1899)Imperoyal, Nova Scotia, CanadaBoat · WreckAdvanced+26 mBest Jun–Aug · estimated7 mm / dry
3. Wellesly RockMillview, Nova Scotia, CanadaBoat · ReefIntermediate+16 mBest Jun–Aug · estimated7 mm / dry
4. Shakotan BikuniFunama, Hokkaidō, JapanShore · Reef · WallEstimated: Intermediate+30 mBest Jun–Oct · estimated5 mm
5. Mill Cove MarinaMillview, Nova Scotia, CanadaShore · Channel · WallEstimated: Beginner-friendly12.8 mBest Jun–Aug · estimated7 mm / dry
6. Gl. FærgehavnSnoghøj, Southern Denmark, DenmarkShore · DriftEstimated: Intermediate+25 mBest May–Sep · estimated
7. Gl. ÅlboMiddelfart, Southern Denmark, DenmarkShore · ReefEstimated: Advanced+45 mBest May–Sep · estimated
8. Wemyss Bay - SS KintyreWemyss Bay, Scotland, United KingdomWreckEstimated: Advanced+50 mBest Jun–Oct · estimated7 mm / dry
9. Escoumins - Crique OuestLes Escoumins, Quebec, CanadaDrift · WallEstimated: Advanced+40 mBest Jun–Sep · estimated7 mm / dry
10. Les Escoumins - Baie des anémonesLes Escoumins, Quebec, CanadaDrift · WallEstimated: Intermediate+30 mBest Jun–Sep · estimated7 mm / dry
11. Duck Island Isles of ShoalsNew Castle, New Hampshire, United StatesPinnacleEstimated: Beginner-friendly12.2 mBest Jun–Sep · estimated5 mm
12. Isles of Shoals Duck Island and Shag RockNew Castle, New Hampshire, United StatesPinnacleEstimated: Beginner-friendly12.2 mBest Jun–Sep · estimated5 mm
13. Anna JacobapolderBruinisse, Zeeland, The NetherlandsShoreEstimated: Intermediate+30 mBest Jun–Oct · estimated5 mm
14. SaltstraumenLøding, Nordland, NorwayAdvanced+12 m–30 mBest Jun–Sep · estimated7 mm / dry
15. Blinde DamOosterland, Zeeland, The NetherlandsShoreEstimated: Beginner-friendly18 mBest Jun–Oct · estimated5 mm
16. ZuidwegBruinisse, Zeeland, The NetherlandsShoreEstimated: Beginner-friendly15 mBest Jun–Oct · estimated5 mm
17. ZoetersboutBruinisse, Zeeland, The NetherlandsShoreEstimated: Advanced+40 mBest Jun–Oct · estimated5 mm
18. DijkvalHaamstede, Zeeland, The NetherlandsShoreEstimated: Intermediate+25 mBest Jun–Oct · estimated5 mm
19. HalverwegeZierikzee, Zeeland, The NetherlandsShoreEstimated: Intermediate+25 mBest Jun–Oct · estimated5 mm
20. GoudzwaardegBruinisse, Zeeland, The NetherlandsShoreEstimated: Beginner-friendly15 mBest Jun–Oct · estimated5 mm
21. AmmoniakhavnenSnoghøj, Southern Denmark, DenmarkDrift · WallEstimated: Advanced+42 mBest May–Sep · estimated5 mm
22. Sint AnnalandSint Philipsland, Zeeland, The NetherlandsShore · DriftBest Jun–Oct · estimated5 mm
23. Mill Cove Wharf Jetty SideChester, Nova Scotia, CanadaShore · WallBest Jul–Aug · estimated7 mm / dry
24. Les Joyeux CorsairesSaint-Denis-d'Oléron, Charente-Maritime, FranceBeginner-friendlyBest Jun–Sep · estimated5 mm

Sources: Species occurrences: OBIS (CC BY 4.0), GBIF.org