Frog (player and mob food source)

Frogs - Mostly live in swamps, generally stay on lilypads. But can spawn in other biomes. Relatively rare like turtles and can swim as well. Jungle frogs, shoot poison at things randomly.

Frog Legs - Can be eaten by the player. Is not very filling. 

Frogs are hunted by owls (different update idea).

I think this would be a fun update, because it would increase fun things to look for while swimming. And the Jungle frogs would provide a dangerous element to jungles.