Viviparous fish are among the most popular aquarium fish species. Earned its popularity because of the ease of breeding in aquariums, even without any special conditions. Main popular representatives of the species: guppies, swordtails, and platys mollienesia. Due to the ease of breeding, viviparous fish have been widely disseminated among breeders. They are called viviparous, because they don’t spawn and immediately throw the fry, they develop the female in the abdomen after fertilization by the male of the female. Other viviparous fish kept in aquariums more often. They are less popular because of the modest color or bad habits — excessive aggressiveness or jednosti.
Sex differences viviparous:
Anal fin of females have fan-shaped. Anal fin of the male has the appearance of a twig (gonopodium) and can rotate in all directions.
Mosquitofish. A male and female.
Conditions viviparous fish:
Almost all types of viviparous fish will be suitable tank volume 100 litres, planted with aquatic plants. Some viviparus, for example mollienesia, doing a good job with small growths of algae on the plants, thereby helping us in cleaning and maintaining an aquarium. But there are those types of viviparous fish that don’t mind to eat some plants, especially tender leaves. Continue reading
Some of the most popular among fans — the family Pomacentridae. This reef inhabitants of subtropical and tropical seas. Look these fish are thick and sturdy, they have a very bright color. But a real favorite of aquarists is a clown fish due to its small size and high resistance to harmful factors and diseases. It draws the family and its unusual behavior. For example, a clown fish can coexist with poisonous polyps. The reasons for this cohabitation still remains a mystery to scientists.
Clown and anemone form a symbiotic relationship. At first the fish allows itself a little sting, and then produces a protective substance and lives near poisonous
clowns in anemones
polyp without fear of predators. The clown “cares” for his Actinia, removing remnants of food, mellowing, water and even attracting other animals to food to the polyp. So anemone and clown fish provide mutual protection and benefit. The clownfish eats zooplankton and algae.
Another amazing present to view orange amphiprion. It is a bright fish in a large orange and white stripes. In one pack there is always only one breeding pair and several smaller males. They are not able to reproduce and still not clear of their role. Continue reading
Today is the international Black sea day. A few Crimeans know that the sea in which they so love to swim, listening to the sound of waves, breathe the sea breeze, in many ways unique. We offer you a selection of interesting facts about the Black sea.
1 – Mountains around the Black sea are constantly rising, and the sea itself increases. And if the mountains grow only a few inches per century, sea occurs on land with a speed of 20-25 cm over 100 years. Some ancient cities had already disappeared at the bottom of the sea.
2 – Among planktonic algae found in the Black sea, there is a very unusual view nochesvetka. She has the ability to Postretirement, and because of it in August, the Black sea is sometimes lit.
3 – the Only mass shark inhabiting the Black sea prickly shark Katran. He is afraid of people and rarely comes to shore. The only danger to humans represent the dorsal fins of crambe with large poisonous spikes. Continue reading