The Smallmouth macropinna
Living in the depths of the North Pacific ocean macropinna the Smallmouth has a very unusual appearance. Her transparent forehead, through which she could spy out the production of their tubular eyes.
Unique fish opened in 1939. However, at that time did not work well enough to study, in particular the structure of the cylindrical eyes of the fish, which can move from vertical to horizontal and Vice versa. It was done only in 2009.
Then it became clear that the bright green eyes of this little fish (it does not exceed 15 cm in length) are filled with a clear liquid chamber of the head. This camera covers a dense, but at the same time elastic transparent membrane, which is attached to the scales on the body of the Smallmouth macropinna. Bright green eyes of fish due to the presence of a specific yellow pigment.
As for the Smallmouth macropinna is characterized by the special structure of ocular muscles, eyes cylindrical shape can be both upright and horizontal, when the fish can see right through its transparent head. Thus macropinna can notice the prey, and when that is ahead of her, and when floating above it. And as soon as production — obichnogo zooplankton — is at the mouth of the fish, she swiftly grabs her.
10. Sea spider
These arthropods, which actually are not spiders, or even arachnids, are common in the Mediterranean and Caribbean seas and in the Arctic and southern oceans. Today there are more than 1300 species of this class, some of which reach 90 cm in length. However, most sea spiders have small size.
These animals have long legs, which is usually about eight. Also, sea spiders have a special appendage (proboscis) that they use to suction food into the intestine. Most of these animals are carnivorous and feeds on flowing down, sponges, polychaete worms and bryozoans. So, for example, sea spiders often feed on tube coral: they insert the proboscis into the body of sea anemones and begin to absorb its contents. And since sea anemones are usually more sea spiders, they almost always survive after such “torture”.
Sea spiders live in different parts of the world: in the waters of Australia, New Zealand, Pacific coast of the US in the Mediterranean and Caribbean seas and in the Arctic and southern oceans. Moreover, they are most common in shallow water, but can be detected and at depths up to 7000 meters. They often hide under rocks or camouflaged among the algae.