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Viral hemorrhagic septicemia. Viral hemorrhagic septicemia (VHS) is a deadly infectious fish disease caused by Viral hemorrhagic septicemia virus. It afflicts over 50 species of freshwater and marine fish in several parts of the Northern Hemisphere. [1] Different strains of the virus occur in different regions, and affect different species.
Metynnis argenteus. Metynnis argenteus is a species of serrasalmid fish endemic to the Tapajós River Basin in Brazil. It is one of the species known in the aquarium trade as the "silver dollar". M. argenteus is generally considered the archetypal silver dollar, although it and the very similar M. hypsauchen frequently have been confused.
Silver dollar is a common name given to a number of species of fishes, mostly in the genus Metynnis, tropical fish belonging to the family Serrasalmidae which are closely related to piranha and pacu. Most commonly, the name refers to Metynnis argenteus .
Ciguatera fish poisoning (CFP), also known as ciguatera, is a foodborne illness caused by eating reef fish contaminated with ciguatoxins. [4][2] Such individual fish are said to be ciguatoxic. Symptoms may include diarrhea, vomiting, numbness, itchiness, sensitivity to hot and cold, dizziness, and weakness. [1][2] The onset of symptoms varies ...
Fish diseases and parasites. This gizzard shad has VHS, a deadly infectious disease which causes bleeding. It affects over 50 species of freshwater and marine fish in the northern hemisphere. [1] This flatfish Limanda limanda has an outgrowth called a xenoma. It is caused by a microsporidian fungal parasite in its intestines.
Piaractus brachypomus, the Red-Bellied Pacu or Pirapitinga, is a large species of pacu, a close relative of piranhas and silver dollars, in the serrasalmid family. [1] [2] It is native to the Amazon basin in tropical South America, but it formerly included populations in the Orinoco, which was described in 2019 as a separate species, P. orinoquensis. [3]
The redhook myleus, Myloplus rubripinnis, is a medium to large omnivorous fish of the family Serrasalmidae from South America, where found in the Amazon and Orinoco basins, as well as rivers of the Guiana Shield. It is peaceful and schools often, and can grow to a length of 39 cm (15 in). They are also called the redhook silver dollar and are ...
Saxitoxin is a neurotoxin naturally produced by certain species of marine dinoflagellates (Alexandrium sp., Gymnodinium sp., Pyrodinium sp.) and freshwater cyanobacteria (Dolichospermum cicinale sp., some Aphanizomenon spp., Cylindrospermopsis sp., Lyngbya sp., Planktothrix sp.) [1] [2] Saxitoxin accumulates in "planktivorous invertebrates, including mollusks (bivalves and gastropods ...