Презентация на тему: Starfish

Presentation student 9-A class Alyona Bondar

Starfish

Starfish - interesting and mysterious animal.

Starfish - a veteran of the seabed, it appeared over 450 million years ago.

It belongs to a class of echinoderms.

From the outside it is covered with short needles or pins.

Every ray of starfish, being separated from her body, it is viable and quickly regenerates.

Sea stars are voracious predators, although there are exceptions in the form of herbivorous species feed on algae.

Some starfish even able to dig up prey that is hiding in the sand.

Life starfish can reach 30 years.

At present there are about 1,600 species of sea stars.