Have you ever wanted to summon a bigger fish? Well, here you are then!
These are the rules:
The creature must be able to eat the previous poster's creature.
The creature must be aquatic.
The creature must be bigger then the previous poster's creature.
If fictional, a link must be provided to show that you didn't make the creature up.
And to start us off:
Turritopsis Nutricula, a.k.a. the immortal jellyfish.