Starfish digest their food by putting their stomachs outside their bodies. This allows them to eat food beyond small crevices and even large pieces of food.

In the sea, they eat mainly fish, squid & octopus.
At Noboribetsu Marine Park Nixe, we feed them mackerel, okhotsk atka mackerel, horse mackerel, & sand lance.

The octopus has one brain in the center of its body and a small brain in each of its eight arms. By the way, there are three hearts.

The melon organ is made up of fatty tissue, not brain.
It is so called because this fatty tissue resembles the appearance of a melon.
It acts like a lens that converges sound in one direction & radiates it forward.

They measure rectal temperature from the anus. We measure rectal temperature from the anus because the rectum is almost always in a closed state, is not easily affected by the outside world, and can maintain a constant body temperature.