Who's that pokemon

is that taht thing that um they live in the water and theyre poisonosu or something

Oooo I think I've seen one like this [not irl, in a picture] they're really pretty

THEY HAVE A TONGUE AT THE SIDE OF THEIR BODY SKDKLCOCLLC I DID RESEARCH ON THIS IN 6TH GRADE FOCLCLL

Blue sea dragon