Some are sensitive to light and have the ability to shoot venom loaded spines at a short distance. Sea Urchins are highly venomous and can piece through a wet-suit.
Predators of sea urchins are triggerfish and large wrasses, who nibble away at their spines before turning them over to eat the fleshy undersides. Their anus is on top in most sea urchins, except the heart urchins where it is at the rear. The colorful display is actually made up of large. They have well developed jaws for grinding their prey. A fast-growing shrubby vine that can grow 40 feet long, Bougainvillea uses its thorny stems to support itself on nearby plants or structures. Sometimes they hitch a lift on the back of crabs.
Sea Urchins use tubed feet to get around, often in large impenetrable masses for protection. These large sea urchin with long and mobile spines can often be found with fish swimming in between their spines for protection. Also known as Black Longspine Urchin, Diadem Sea Urchin, Diadem Urchin, Hatpin Sea Urchin, Hatpin Urchin, Long-spined Black Sea Urchin, Long-spined Sea Urchin, Needle-spined Urchin, Pacific Long-spined Black Sea Urchin, Porcupine Sea Urchin, Sea Hedgehog, Setosum Spined Urchin, Star Urchin.įound singly or in large groups, moving across rubble, sand, shingle, and seagrass beds, in bays and lagoons.Īmongst their spines these sea urchins may have Banggai Cardinalfish - Pterapogon kauderni
