Aquarium Fish Wholesale

Countless aquarists have noticed that some of their fishes react more enthusiastically to their presence than to that of strangers. If they do “recognize” the person who looks after them, how do they do it? They are capable of distinguishing the special characteristics of the vibrations caused by the footsteps of such and such person, which are transmitted to the water of the aquarium. Not only that, their sense of sight, although not perfect, helps them in this task of “recognition.” The swim bladder Fish have a swim bladder, also known as an air bladder. This is an organ connected to the digestive system, which fills up with gas and helps fish to regulate their flotation when moving between two different types of water. They empty it to dive and fill it up when they need to come nearer the surface. Bottom-dwelling fish generally have a smaller swim bladder, or none at all, as they rarely swim in open water. The reproductive organs Males have two testicles that are linked to the vas deferens. while females have ovaries extended by the oviducts. In both cases the sexual products - the spermatozoa and ova - are expelled via the genital orifice. As the fertilization of the eggs is external and takes place in the water, there are no organs for coupling and fertilization, except in the case of livebearers. DO FISH SLEEP? When an aquarium is abruptly switched on in the morning, it is noticeable that its occupants do not immediately resume their normal activity. Some of them are on the bottom of the tank, some in the plants, and others remain almost immobile in the water. It is difficult to speak of sleep in the generally accepted sense of the word, but it is certain that fish have periods of restfulness, of varying degrees. This can be verified at night, with the aid of a small flashlight: the fish are practically stationary (apart from nocturnal species), but their eyes are not closed as they have no eyelids. DO THEY FEEL PHYSICAL PAIN? The sensation of pain is sent to the brain via the sensory nerves. As fish are endowed with the latter, it can be assumed that they feel pain when they are hit or wounded, and perhaps even when they are sick.
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This entry was posted on Tuesday, March 25th, 2008 at 11:21 am and is filed under Fish Wholesale. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.