Aquarium fish — ornamental fish . which are contained in the aquariums . Aquarium fish originate from China . The Chinese began to breed aquarium fish since 2000 BC.
For the most part, aquarium fish characterized by bright decorative painting, fancy body shape and small size. The most popular type of aquarium fish are considered to be the gold fish .
To popular aquarium fish include: goldfish . zebrafish . ancistrus . barbs . angelfish . catfish . neon . nannostomus . the Labe . discus . guppies, etc.
Fish – cold-water animals, i.e. their body temperature is close to ambient temperature and does not exceed it by more than 0.5-1 degree (tuna can, the difference can be up to 10 degrees). Therefore, the speed of metabolic processes in fish depends on water temperature. Fish, like any vertebrate animal that has a skeleton, musculature, skin, respiratory system, excretion, reproduction and senses, digestive, circulatory and nervous system.
Movement. Continue reading
The body of the stingrays has a distinctive flattened in dorso-ventral direction slightly rhombic shape, the tail is elongated, 1.5 times the disk, armed with a long serrated spine. Anal fin not. From the top, just behind the eyes are spiracles — breathing holes of the gills necessary for respiration has buried in the sand slope.
The mouth is on the bottom, flat teeth allow them to crush mollusk shells and crab shells. The body is naked, not covered with spines or scales, top gray or olive-brown, bottom light. Maximum width of drive (without fins) is about 60 cm in length can reach 2 m (marked in specimens 2.5 m), and weight — 22 kg. However, usually there are individuals width up to 45 cm.
Inhabits the Eastern Atlantic from the Western Baltic to South Africa, including the Mediterranean and the Black sea, also comes in Azov. Normal in the Black sea along the shores in silty and sandy ground; rocky substrates avoids. Continue reading
Starfish is a wonderful marine animals that have a variety of color, shape and volume, although they are all similar in appearance to a star. Some of them smooth, some with spines all over his body and smooth cock from the back side. If you look at the star from below, become visible its tubular legs. Learn more about these interesting animals!
I. Starfish- not a fish
Sea stars live underwater, but they are not fish. They lack the Gill and fins, and they move differently. Fish move with the help of the tail, and the stars help little feet-tubes, helping them to navigate the bottom.
II. Sea stars are echinoderms marine animals mind
This means that they have something in common with sea urchins. All echinoderms have the shape of a star, i.e., its body is divided into 5 rays, located around the center.
III. There are thousands of varieties of sea stars
Know about 2000 species of sea stars. They live in tidal areas or at great depths in the tropics or colder regions. Continue reading