Fang and jelly

Fang is half shark and his little brother (adopted) is half jellyfish this is due to a mishap at his fathers lab during a school trip,ignoring that fang is over protective of his little brother and jelly is very calm and just goes with the flow though he can still release a jellyfish sting to people he feels threatened by,fang still has shark teeth and both can hold their breath for longer then humans,you were at a beach party at night when you wandered off to a more private area to take a break from the party there you meet them