Mackerel

1. Rocky LedgeOxford, Nova Scotia, CanadaBoat · ReefIntermediate+20 mBest Jun–Aug · estimated7 mm / dry
2. Royal Canadian Navy gate vessel HMCS Ypres (1940)Shearwater, Nova Scotia, CanadaBoat · WreckAdvanced+27 mBest Jun–Aug · estimated7 mm / dry
3. Schooner Gertrude de Costa (1950)Imperoyal, Nova Scotia, CanadaBoat · WreckAdvanced+28 mBest Jun–Aug · estimated7 mm / dry
4. Schooner Reaper (1899)Imperoyal, Nova Scotia, CanadaBoat · WreckAdvanced+26 mBest Jun–Aug · estimated7 mm / dry
5. Sea Fury fighter bomber plane (1952)Shearwater, Nova Scotia, CanadaBoat · WreckAdvanced+25 mBest Jun–Aug · estimated7 mm / dry
6. Warrior ReefTrenton, Nova Scotia, CanadaBoat · ReefIntermediate+25 mBest Jun–Aug · estimated5 mm
7. Wellesly RockMillview, Nova Scotia, CanadaBoat · ReefIntermediate+16 mBest Jun–Aug · estimated7 mm / dry
8. Western ReefEastern Passage, Nova Scotia, CanadaBoat · ReefIntermediate+20 mBest Jun–Aug · estimated7 mm / dry
9. U-869New Jersey Shore, United StatesBoat · WreckAdvanced+73 mBest May–Aug · estimated3 mm
10. Cova do SonoPeniche, Lisboa, PortugalShore · Cavern · Pinnacle · WallEstimated: Beginner-friendly12 mBest Jun–Oct · estimated5 mm
11. Whiskey Reef - Skovshoved HavnCharlottenlund, Capital Region Of Denmark, DenmarkShore · ReefEstimated: Beginner-friendly6 mBest May–Sep · estimated5 mm
12. Mill Cove MarinaMillview, Nova Scotia, CanadaShore · Channel · WallEstimated: Beginner-friendly12.8 mBest Jun–Aug · estimated7 mm / dry
13. PiscinasPeniche, Lisboa, PortugalChannel · Pinnacle · Reef · WallEstimated: Beginner-friendly15 mBest Jun–Oct · estimated5 mm
14. BergumLangeoog, Lower Saxony, GermanyWreckEstimated: Beginner-friendly17.9 mBest May–Oct · estimated5 mm
15. Marina af HönöHönö, Västra Götaland, SwedenWreckEstimated: Intermediate+30 mBest May–Sep · estimated5 mm
16. CulebrasSopela, Biscay, SpainReefEstimated: Intermediate+28 mBest Jun–Sep · estimated5 mm
17. Cala de los frailesHondarribia, Basque Country, FranceReef · WallEstimated: Beginner-friendly16 mBest Jun–Sep · estimated5 mm
18. SkovshovedCharlottenlund, Capital Region Of Denmark, DenmarkMuckEstimated: Beginner-friendly9 mBest May–Sep · estimated5 mm
19. Plaza de TorosSantander, Cantabria, SpainChannel · DriftEstimated: Intermediate+23 mBest Jun–Sep · estimated5 mm
20. Las AgujasSantander, Cantabria, SpainDrift · PinnacleEstimated: Intermediate+18 mBest Jun–Sep · estimated5 mm
21. Pecio SkotlandSantander, Cantabria, SpainWreckEstimated: Advanced+45 mBest Jun–Sep · estimated5 mm
22. Pecio "Rio Miera"Santander, Cantabria, SpainWreckEstimated: Advanced+42 mBest Jun–Sep · estimated5 mm
23. La CorberaSantander, Cantabria, SpainCave · Cavern · Channel · PinnacleEstimated: Intermediate+18 mBest Jun–Sep · estimated5 mm
24. Duck Island Isles of ShoalsNew Castle, New Hampshire, United StatesPinnacleEstimated: Beginner-friendly12.2 mBest Jun–Sep · estimated5 mm

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