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Black spot disease in crustaceans, commonly studied on the edible brachyuran crab Cancer pagurus, is a progressive degradation of the carapace cuticle and expresses itself by discoloration of the carapace. [1] The disease has been observed on a variety of crustacean species including crabs, lobster, and shrimp. [2]
A circular fungus attaches itself to gill nodules in shrimp. Black gill disease is visible to the human eye. Affected gills may exhibit crusted, surface-corroding, [citation needed] scattered light brown to black spots or a large black patch on one or both sides of the fish. [3] Discoloration at the gill area will be distinct from the rest of ...
A creek chub with black spot disease. Black spot disease is a disease affecting fish. It is caused by larvae (metacercariae) of Diplostomatidae or Heterophyidae flatworms, which are encysted in the skin. It can affect both freshwater and marine [1] fish. [2] [3] It appears as tiny black spots on the skin, fins, and flesh of the fish.
Living for up to two years, these spiral-shaped snails, which sometimes have black spots, will feel right at home in hard water, with a pH level between 6.5 and 8.5 and a temperature between 65 ...
Diagram of Litopenaeus setiferus. Litopenaeus setiferus (also accepted: Penaeus setiferus, [1] and known by various common names including Atlantic white shrimp, white shrimp, gray shrimp, lake shrimp, green shrimp, green-tailed shrimp, blue-tailed shrimp, rainbow shrimp, Daytona shrimp, Mayport Shrimp, common shrimp, southern shrimp, and, in Mexico, camaron blanco) is a species of prawn found ...
The head of a mantis showing the black pseudopupil in its compound eyes The eye of a mantis shrimp has three regions, each with its own pseudopupil.. In the compound eye of invertebrates such as insects and crustaceans, the pseudopupil appears as a dark spot which moves across the eye as the animal is rotated. [1]
The disease is highly lethal and contagious, killing shrimp quickly. Outbreaks of this disease have wiped out the entire populations of many shrimp farms within a few days, in places throughout the world. White spot syndrome virus (WSSV) is the lone virus of the genus Whispovirus (white spot), which is the only genus in the family Nimaviridae. [1]
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