Jumbo Shrimp can grow to giant or shrink to minute sizes. Unfortunately, he retains his same mass in both sizes, so as a 200-lb giant, a strong wind can knock him over, as a 200-lb tiny person, he has trouble moving.

Ocean-11
Jumbo Shrimp
Sea Monkey
King Crab
Barnacle Bill the Sailor
Seal-Ion
Flying Fish
Super Squid
Kara Geenan
Mental Mussel
Barracuda
Akakak