Red Sea - Reef - night - single - snorkeling / scuba diving - 5 / 25 m depth

Diodontidae. Fish-urchin may swell as Blowfish, and, moreover, all their body is covered with sharp spines, which is an additional means of protecting them. At rest, these needles lie along the body, but if the fish is attacking, the needles are straight up, which gives it a frightening look.

Fish-urchin teeth, fused together to form sturdy plate that allows the fish-bite hedgehog shells of mollusks, crustaceans shells and even sea urchins. Most species of fish, sea urchins are active at night and spend the day, hiding in caves and crevices.