
Awesome lines for the dolphin! It's really cute!

The coral is good too, but it'd be better if there was more of it, not just a clump in one place. Maybe a few shadows of fish in the backround for realism?

Ideas for other animals:
Penguins
Seals
Jellyfish
Hammerhead Shark
Hippocampi (half horse, half fish)
Seawolf (wolf with a plesiosaur-like tail and whale-like fins. its ears are fins too, and it has a thinner snout and smaller head)
Squid (there's a difference between Octopi and Squid. lol)
Sea Crate (It's an ocean-dwelling snake. It looks like a snake, but its tail is flattened like a paddle)
Saltwater Crocodile (Alligators and crocs have different jaws, crocs' teeth stick out, gators' teeth don't as much. One smiles and the other frowns, I forget which though)
Random fish. Clownfish in Anenome that you can color in, colorable coral, colorable starfish, little fish, baby jellyfish, an eel, all in the backround that can be colored in)
Blue Whale
Just a few suggestions. Also, is it possible to make some of the editable sea creatures smaller, and put them in different areas of the screen? So it's not like you're coloring in JUST a sea turtle or JUST an octopus, but you can color in multiple animals and make it look natural. =3
You're editable is gonna be really famous.
