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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.
This fish reaches 8.5 centimeters in length. It is bright blue in color; the male has a yellow snout and tail, and the female and juvenile usually lack yellow but have a black spot at the base of the back edge of the dorsal fin. [2] [5]
Heavily infected fish appear emaciated and lethargic. Infection targets skeletal muscle, which will appear more opaque through the skin. Piscine tuberculosis: Mycobacterium marinum bacteria: All: Weight loss evident on underparts, with corresponding loss of appetite, papules, discoloration and bulging eyes. Amputation Fin rot: Bacterial or ...
Skin possessed approximately six feet [13] of extra skin. He was capable of stretching, deforming, wrapping, expanding, and compressing this extra amount of epidermis.When Skin is performing any of these stunts, it is only the epidermis that was manipulated; Skin's skeletal structure was the same as any normal, average person of his age and height.
The spot-fin porcupinefish is a medium-sized fish which grows up to 91 cm, but the average size mostly observed is 40 cm. [2] Its body is elongated with a spherical head with big round protruding eyes, and a large mouth which is rarely closed.
This discoloration, black spots on the carapace, chelae, or legs, is the result of melanisation; a defense response to the deterioration of the cuticle. [3] Black nodules have also been observed on the gills, heart, and hepatopancreas of affected individuals, and the presence of the disease is associated with accumulation of material in the ...
Rhina ancylostoma is a heavily built fish growing to 2.7 m (8.9 ft) long and 135 kg (298 lb) in weight. [ 3 ] [ 7 ] The head is short, wide, and flattened with an evenly rounded snout; the front portion of the head, including the medium-sized eyes and large spiracles , is clearly distinct from the body.
All icefish are believed to be piscivorous, but can also feed on krill. [10] Icefish are typically ambush predators; thus, they can survive long periods between feeding, and often consume fish up to 50% of their own body length at one time. Maximum body lengths of 25–50 cm (9.8–19.7 in) have been recorded in these species.