His name is Clione limacina and it is known as the angel of the sea, and it is possible that when we hear the name, we imagine it as some kind of animal with wings or something similar to it.
It inhabits exclusively in the northern waters of our planet, being found in cold waters of the Arctic Ocean, North Pacific Ocean and North Atlantic Ocean. A closely related species, antarctica clione, is found in Antarctic waters. It is a species that, as you can see, enjoys the cold.
Clione limacina it is an almost transparent mollusk and is a protandrous hermaphrodite; that is, at birth they are all males and some become females as they grow up.
There are two subspecies that differ in body length. The northern subspecies lives in cooler waters, maturing at 3 cm (1.2 in) and can reach a size of 7-8.5 cm (2.8-3.3 in). The size of the southern subspecies is 1.2 cm (0.47 in).
Its displacement is given by a locomotive flapping which simulates a kind of underwater flight. It uses its speed to catch its prey, being able to beat its wings up to 2 times per second.
Their usual diet consists of slugs and marine worms of all kinds. And despite what it may seem, it is quite a powerful predator, at least when it comes to its diet. It is not an animal that can endanger humans or larger animals. But when it comes to its prey, it is quite fierce when it comes to hunting them.
In addition, you can have practices of cannibalism. When food is scarce, it is an animal that can end up attacking others of its kind. And he has the strength to do it, so he is considered an aggressive being.
When the breeding season arrives, the molluscs mate to give rise to the appearance of their young. However, the incubation period is quite long, the time can be as long as a year, at which time all the small eggs will begin to appear, the result of their union.
Clione limacina it is a prey for planktonic feeders, such as whales. Some fish are also their predators. For example, the Chum salmon is an important predator of the angels of the sea.