useful sea

Phytoplankton includes green, blue-green, diatom, peridine and diatom algae.

In the zooplankton there are roe of more than 30 species of fish, jellyfish, sea worms, copepod crustaceans, larvae of molluscs, worms, crayfish and the "culprit" of the increased sea of ​​one-celled noctilyuk, which accounts for half the weight of the zooplankton in certain periods.

Oysters and mussels are specially bred. Oysters live up to 30 years. They are very lively: they can do without the sea for more than two weeks.

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The composition and nature of the distribution of living organisms in the Black Sea is very original and unique.

Exuviella, peridinium, and ceratium are the most common among the rapidly developing algae in the summer. Diatoms have two seasonal peaks in reproduction: early spring and fall. In February-March, during the outbreak of phytoplankton development, you can observe a change in the color of the water in the coastal part of the sea - it turns from blue to brown.

The Black Sea is one of the least populated seas on earth. One cubic kilometer of Black Sea water contains only thirty-seven kilograms of biological mass.

Phytoplankton includes green, blue-green, diatom, peridine and diatom algae. The zooplankton includes caviar of more than 30 species of fish, jellyfish, sea worms, copepod crustaceans, larvae of molluscs, worms, crayfish, and the "culprit" of the glow of the sea, single-celled noctiluka, which accounts for half of the weight of zooplankton in certain periods.

Among the last 500 species of unicellular organisms, about 1900 are invertebrates, 185 species of fish and 4 species of mammals.

Sea water is very "lazy" and heats up slowly. Therefore, for example, the water in the Mediterranean Sea becomes warmest not in July, when it is hot, but in September.

At the bottom of the deepest seas - about 0ºC. At the same time, salt water begins to freeze at a temperature of -1.5 ºC; - 1.9 ºC.