Heart of the Ocean

All non-token Merfolk, Homarid, Cephalid,
Crab, Squid, Leviathan, Shark, Whale, Serpent, Octopus, Crocodile, Fish, Leech, Kraken, Frog, Squid, Worm, Alligator, Homarid, Starfish, Sponge, Turtle, Nautilus, Trilobite, Jellyfish, Oyster, Otter, and Eel Creatures enter with a +1/+1 counter.

(Melds with Carcinus, Soul Pincher)

"Isn't the ocean just one big soup?" - Rocco