These articles are about creatures that appear in the Ecco The Dolphin: Defender of the Future universe.
- Antidote Fish
- Baby Dolphin
- Dolphins
- Enormous Crocodile
- Fish
- Giant Eel
- Giant Octopus
- Great Fish
- Great White Shark
- Humpback Whales
- Jellyfish
- Mantarays
- Moray Eels
- Sharks
- Stingrays
- Turtles
- Young Dolphin