Buy fish online - The mucus, skin, and scales
The mucus, skin, and scales Fishes’ bodies are covered with a mucus that plays a double role: it reinforces the hydrodynamics by “smoothing” the skin, and it affords protection against the penetration of parasites or pathogenic elements. The latter point is extremely important, and it explains why fish must not be moved by hand: this risks damaging the mucus and facilitating the development of certain diseases. Contraryto a widely held belief, the scales do not stick out of the body but are an integral part of the skin, and they are visible through a fine layer of transparent epidermis. When a scale is raised, damaged, or torn off, the skin itself is equally affected and becomes vulnerable to the action of pathogens. Coloring Every fish has a basic coloring that can be modified. Their shiny, metallic appearance, derived from the crystals present in the cells of the skin, varies according to the direction of the light striking them. A fish’s color is a result of the different pigments located in the epidermis. These can change, slowly, for reproduction and camouflage, under the control of hormones, or more quickly, for flight or aggression,controlled by nerves. The coloring of a fish can also vary when it is suffering from disease or nutrient deficiency.
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