The spiny dogfish is basically a fishy ninja with a need for speed! It’s like a sleek sea sausage with pointy bits sticking out everywhere—kind of like a hedgehog decided to give swimming a shot. This creature has a long tail and a face that’s more business than beauty, featuring a mouth full of little teeth that say, “I’m ready for a snack!” They also have fins that look like they’re stuck in perpetual “let's swim fast” mode. Picture a shark that forgot to grow up, and you've got yourself a spiny dogfish!