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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.
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 the body. These symptoms are separate from gill fouling or fin ...
As the name implies, it causes severe anemia of infected fish. Unlike mammals, the red blood cells of fish have DNA, and can become infected with viruses. The fish develop pale gills, and may swim close to the water surface, gulping for air. However, the disease can also develop without the fish showing any external signs of illness, the fish ...
The eyes are positioned on the top of the head, and the fish floats at the water surface with only the lower half of each eye underwater. The two halves are divided by a band of tissue and the eye has two pupils, connected by part of the iris. The upper half of the eye is adapted for vision in air, the lower half for vision in water. [35]
The genus name Oliotius is derived as a combination of a portion of the specific epithet oligolepis and its former genus name Puntius. [2]The common name "checker barb" (as well as such related names as "checkered barb", "chequer barb" and "checkerboard barb") derives from the black marks on its side similar in appearance to those found on a checkerboard.
The trophont is not visible to the naked eye until it has fed on the fish and grown to a diameter of about 0.3-0.5 millimetres. The white spots may reach more than 1 mm in diameter and are easily recognized on skin and fins whereas trophonts attached to the gills are hard to see due to the gill cover ( operculum ).
Due to its upturned eyes, an aquarium with rough objects should be avoided, as that can harm or hurt their eyes or even cause blindness. It is developed from the dorsal-less telescope eye goldfish. Some celestial eye goldfish have a dorsal fin. Bubble eye goldfish - The small, fancy bubble eye has its eyes accompanied by two large fluid-filled ...
Bodies of the males are yellowish brown, with white spots above and bluish orange spots/bands on the flanks. Found near coral and rocky reefs. Omnivorous 25 cm. Aquarium fish Spot-fin porcupinefish (Bouletangue) Pale green to olive brown covered with black spots; shades of white below. Takes the shape of a ball covered with spines when inflated.