The snake produces secretion to facilitate molting. The eyes appear white because the secretion is white.

Hermit crabs that live on land have remnants from when they were in the water, and breathe through their gills and abdominal skin. They can only breathe in moist places.

Dolphins are classified as smaller than 4 meters in length, while whales are classified as larger.
However, there are exceptions and there is no clear standard.

It is said that it is the closest to spiders in terms of classification.

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.