Catfish-the Changeling (Synodontis nigriventris)
Prevails in the regions: the basin of the Congo
Body length: 10 cm
Food: carnivorous fish
Habitat: fresh water
Catfish-shifter, or synodontis nigriventris, belongs to the family mochokidae. The homeland of this species is Africa, and to meet him in the natural environment, it is necessary to visit the Congo basin. Shifters reach a length of 10 cm inhabit fresh water and belong to the group of predatory fish.
In Europe the catfish-the shapeshifter first appeared relatively recently – in 1950 in Amsterdam. In our days the activity of this species, both in captivity and in natural conditions, are poorly understood. Continue reading
Do fish sleep in an aquarium?
What do fish in our aquarium in the afternoon — we can check at any time. And that’s what they do at night when we sleep? You probably haven’t even thought about it, but they also sleep.
Actually, the biological functions of the body fish are very different from mammals. Because of this, owners of aquarium fish is often not familiar with how it works internal organs their underwater Pets.
So, do fish sleep? Yes and no. They are “asleep” in his own way, not the usual way for us. That is, at the time of “rest” they produce a certain type of activity that we call sleep.
People spend in sleep on average eight hours a day. This is equal to approximately one-third of all human life. For humans sleep is a period of time in which our heart rate and breathing decreases, relaxes muscles and a period of inactivity. “Sleep” in animals is defined in the General Veterinary Dictionary as “…a period of rest, during which suspended physical function and reduced sensitivity to external factors”. Continue reading
Suborder Fern stingrays (Myliobatoidei). Sea creatures: Sharks, rays, lampreys, higher fish and other sea encyclopedia. Information portal – the Third planet
The inhabitants of the sea. Encyclopedia.
Suborder Fern stingrays (Myliobatoidei)
In the suborder Myliobatoidei of the species of Dasyatidae family get together often brightly coloured species, for example, Taeniura lymma , which is the blue spotted dorsal portion, which makes this fish a desirable inhabitant of aquariums. Members of the genus Taeniura quite common in the Indian ocean, off the coast of Africa and Australia, in the Red and Mediterranean seas.
31. Taeniura lymma
Dasyatis violacea  lives in the Mediterranean sea. Other species of the genus Dasyatis live in tropical seas, and some live in large rivers of South America and Africa. Sharp tail thorn these rays can inflict painful wounds. Continue reading