Of all the inhabitants of the sea depths of mostly afraid of sharks, but on the bottom of the sea you can find such instances, compared to which the shark — sweet little creature.
Like from horror movies that the black fish has a bioluminescent appendage on his chin, which lures the victim and instantly missing fanged mouth.
Deep sea angler
This predator with very well stretch the stomach, it can swallow prey that surpasses it in size. Baits are light fotoforum at the tips of the spikes on his head.The relationship between males and females is most unusual. To female teeth linked dwarf male, and lives on her body, like a parasite, feeding on her blood. After a while it fused with her lips and tongue, and other organs and parts of the body reduced and it is converted into the epididymis, which produces sperm. Continue reading
Thus, the spawning period is defined more clearly than most tropical species, for which the importance is not so much the temperature, the amount of rainfall.
You can determine the start time of spawning, regularly measuring the temperature of the water in the pond, because the spawning usually begins at a temperature of about 20°C. At this temperature the eggs develop normally. Plus or minus 5 °C, and the fry will be deformed, because things will develop too quickly or too slowly.
Physical changes in the fish also indicate the approach of spawning. For example, the males of the family Cyprinidae appear white swellings, called tubercles. Fish such as Orfe, Rudd, goldfish and koi, the tubercles appearing on the Gill covers and pectoral fins, while Cipriani – along the scalp.
Some fishes, such as sticklebacks, coloring of the male becomes brighter, attracting mates and scaring off rivals. Females of all cold-water species become fuller males. Continue reading
The majority of aquarium fish in natural conditions are inhabitants of tropical and subtropical freshwater reservoirs, for the life of them requires a relatively high temperature of water, approximately corresponding to the temperature of the indoor aquarium.
For the most part, aquarium fish characterized by bright decorative painting, fancy body shape and small size. Particularly popular and most long-term in the aquarium bred varieties of goldfish. Usually belong to aquarium fish from groups Cypriniformes (family characinidae, hemiodontidae, anostomidae, carp, kalitidu, loricariidae), Perciformes (suborder okunevaya and the labyrinth), carpesomediem (viviparous and ikromechuschie form). The most widely rasprostranena among fans guppy, Danio, barbs, angelfish, catfish, neons, nannostomus, etc. Continue reading