The marine world is very interesting and varied. It is impossible to find out about all its inhabitants - life will not be enough for this. However, some features, for example, the ways of movement of sea animals, are very interesting to study.
Instructions
Step 1
The starfish is one of the most mysterious and beautiful animals. And they move due to special ambulacral legs, on which the suction cups are located. They help starfish stay on rocks, rocks and other objects.
Step 2
The sea urchin is the closest relative of sea stars and a very ancient animal. To save himself from dangerous predators, he uses a huge number of flexible legs that can stretch and contract. Due to the fact that there are suction cups at the ends of these legs, sea urchins can move along steep rocks, attach to the bottom anywhere and get food.
Step 3
The squid is the fastest swimmer in the ocean. It moves with its tail forward, while sucking water under the fold-mantle, and then, closing it, forcibly throws out water through a funnel under its beak. The fin is used as a rudder and stabilizer, and the tentacles as a rudder when cornering.
Step 4
Different types of jellyfish have different modes of movement. Some move with the help of muscle contraction (jet movement), others use the force of the wind or current.
Step 5
The octopus is a very interesting sea creature due to the fact that it has two modes of movement. It can crawl on a hard surface using its tentacled suction cups, or it can move by drawing water into the mouth and pushing it back through a special funnel.
Step 6
Holothuria or sea cucumber - these animals move little, more they lie "on their side". And small legs in the form of tubes help them to set in motion, through the channels of which the sea cucumber pumps water.
Step 7
Nautilus. These animals have a different way of movement than other mollusks, because their leg has changed: its end has turned into a funnel, which allows them to swim quite well. Thus, nautilus either crawl along the bottom with the help of tentacles, or, adjusting the depth of immersion by filling the cavity of their shell with water or gas, they slowly swim.
Step 8
Scat. The way these creatures move is very beautiful. They move with their large wing-like fins. The stingray swimming in the sea really resembles an eagle that soars in the sky.
Step 9
Crabs move around in a pretty funny way. They quickly wiggle their little feet, pushing their claws forward for protection. In this case, it turns out that the crab runs sideways.
Step 10
Having studied the ways of movement of some marine animals, one cannot help but be convinced that they are quite diverse and interesting. But we must not forget that there are also animals that lead a motionless lifestyle. These include, for example, corals, oysters and triads.
