Aquatic

Aquatic beasts can breathe underwater. Out of water they die.

They see enemies in the water and reveal water tiles when they move. They can't usually attack enemies on land.

Creatures with this trait: Dolphin, Eel, Fish, Jellyfish, Octopus, Orca, Piranha, Red whale, Shark, Shrimp, Squid, Urchin, Whale

The same tag on heroes means something else.