The animals that have to surface. Dolphins, a dugong, two eared seals, a penguin and a cormorant, recorded here because they are met in the water rather than because they are reliable.
None of these is a sighting anyone can plan. The dolphins are usually passing; the dugong is a seagrass animal and is met by staying still at the edge of a bed rather than by swimming toward it.
The Galapagos endemics are the exception, and are the reason most people dive there. The sea lions and fur seals approach divers of their own accord, the penguin hunts through bait balls at speed, and the flightless cormorant swims down to feed on the bottom. Bulls hold territory and will make that clear; the rule is the same as everywhere, which is to let the animal decide the distance.
Every one has a page. They are shown as a list rather than as pictures because nothing has been photographed or logged for them yet, and a species with nothing behind it should not sit in front of one that has.
How many of the 10 carry a record at each destination. A species usually carries several, so these do not add up to 10.
All 1316 species in one index, with filters for destination, rarity and hazard.