Personalized Cute Jellyfish Ocean Sea Creature Youth T-Shirt. Jellyfish Lover Youth T-Shirt - White has darling little jelly you can personalize for a sea creature gift idea. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.