Which Class Of Fish Has A Swim Bladder? Bony fish differ from fish like sharks and rays in the chondrichthyes class. Instead of cartilage, bony fish have bones. Bony fish also have a swim bladder. The swim bladder is a gas-filled sac that helps keep bony fish buoyant! Do all fish have swim bladders? Swim
Do Sharks Have Penises? Oh, and about that pair of penises, Discovery explains that sharks have “two penis-like organs called claspers,” and that “shark sex is extremely aggressive.” Can sharks urinate? FUN FACT: Sharks don’t pee as you know it. Their urine is absorbed in their flesh and expelled through their skin. When they die,
Do Cartilaginous Fish Have Swim Bladders? Do cartilaginous fish have swim bladders? The swim bladder is missing in some bottom-dwelling and deep-sea bony fish (teleosts) and in all cartilaginous fish (sharks, skates, and rays). Do cartilaginous have swim bladders? Unlike bony fish, the cartilaginous fish do not have a swim bladder, so must move continuously