Shellfish is a fierce carnivorous fish, which likes to eat sea urchins, so it has developed a unique technology to open sea urchins. Because sea urchins are generally covered with thorns, only the lower mouth has no thorns, and the cannonball fish will vigorously spray water on the sea urchin, turn it over and eat it to avoid being stabbed by the sea urchin.

If this move fails, it will bite a long thorn on the sea urchin, pull the sea urchin from the bottom of the sea to the surface, and then release it; When the sea urchin sank, it was already waiting at the bottom of the sea; When the sea urchin sinks to the bottom of the sea, it can bite the sea urchin's mouth and have a full meal.

Life habits of cannonball fish

Shellfish are mainly distributed in tropical and subtropical oceans, and also distributed in the South China Sea of China. Most of them live in shallow water in tropical waters and inhabit large-leaf algae on corals. I am used to lying down freely. When I am in danger, I will quickly drill into the coral reef hole and erect my dorsal fin to fix myself tightly in the hole. Living alone, often hiding in rocks.

Cannonball fish have a very strong territorial concept and cannot be mixed with small fish or corals and anemones. Carnivorous, feeding on fish, shrimp, particulate matter and small fish and shrimp. Female fish dig holes in the sand of their own territory to breed.