Here is the full list of all 16 Hungry Fish Evolution achievements.
Eat 10,000 fry.
Try the hedgehog fish.
Increase the speed of your fish.
Improve the digestion of your fish.
Decrease your fish's appetite.
Get extra life.
Get big teeth.
Get 3 extra lives.
Minimize the appetite of your fish.
Improve digestion in your fish to the maximum.
Maximize the speed of your fish.
Collect all the feltip pens.
Eat 100 hedgehogs.
Catch 500 sharks.
Get the skill of dodging.
Maximize the skill of dodging.