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Do all fish spawn?
Most fish lay eggs, and it is fertilized outside of their body. Fish that spawn, are called oviparous. But some fish give birth to live fry. Such fish are called viviparous.
To live-bearing are guppies, sword fish. The eggs of these fish are fertilized inside the mother’s body and develop there until the fry. At a certain time they are born. This happens 21 days after fertilization.
The number of eggs, fertilized and deferred, differs greatly depending on the type of fish. Some fish lay eggs and abandon her, without showing her any more interest. This is a fish that produce huge amounts of eggs. Those fish that look after their young, they lay only a few eggs.
Caviar can be of two types. One kind of eggs floats on the water surface, the other sinking. The caviar, which floats, is called pelagic. It is usually tiny, bright and contains a lot of protein. Caviar, which is sinking, is called Donna. It is usually harder and more protein in it. Continue reading
View aquarium fish: goldfish
At present, there are dozens of varieties of goldfish. The most similar to silver carp goldfish common. Different from carp, mainly for its yellow-gold color.
One of the varieties of goldfish is the Comet. Characterized by a long body and very long fins. Caudal fin with a deep neckline, two-bladed.
Shubunkin resembles an ordinary goldfish, but it is larger and has a more elongated fins. Scales are colorless, transparent. This fish is valued for an unusual color that can be red, yellow, blue, white, blue, purple, shimmering at the same time.
Valuehost short egg-shaped body with double tail. The dorsal fin is vertical, large.
Oranda is very similar to vualehvostki. The single difference is that fat lump on my head.
Livingonlove different from other goldfish that she has no dorsal fin.
The telescope has too protruding eyes, which are issued in side of 5 cm Continue reading
Striped Marlin.
Tetrapturus audax (Latin), Striped Marlin (eng), Red marlin (Japan)
Distributed in tropical and warm temperate waters of Indian and Pacific oceans.
Striped Marlin is pelagic fish and performs seasonal migrations, moving toward the equator in the cold season and back in the warm season.
A distinctive feature of the striped Marlin is the high dorsal fin equal to the height of the fish’s body. The pectoral fins are easy to fold up and pressed close. The body is strongly flattened laterally.
Back striped Marlin silvery-blue, sides silvery with a blue tint, and white belly. On the sides of the horizontal blue stripes, which persist after the death of the fish that distinguishes a striped Marlin from his fellow species. Continue reading
