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The largest species in the family is Krøyer's deep sea angler fish (C. holboelli), with a standard length of no less than 85.5 cm (33.7 in), the free-swimming males have a standard length no greater than 0.2 cm (0.079 in) and the parasitic males can grow up to 14 cm (5.5 in). [7]
It is one of the largest digenean families, with 25 genera containing hundreds of described species. [2] Bucephalids are cosmopolitan, having been recorded all over the world. They are parasites of fish from freshwater, marine, and brackish water habitat types. [2]
The genus Anisakis was defined in 1845 [2] by Félix Dujardin as a subgenus of the genus Ascaris Linnaeus, 1758.Dujardin did not make explicit the etymology, but stated that the subgenus included the species in which the males have unequal spicules ("mâles ayant des spicules inégaux"); thus, the name Anisakis is based on anis-(Greek prefix for different) and akis (Greek for spine or spicule).
Parasites of coral reef fish include nematodes, Platyhelminthes (cestodes, digeneans, and monogeneans), leeches, parasitic crustaceans such as isopods and copepods, [52] [53] [54] and various microorganisms such as myxosporidia and microsporidia. Some of these fish parasites have heteroxenous life cycles (i.e. they have several hosts) among ...
Visible on its snout are tiny pores which lead to electroreceptor cells. Chimaeras are soft-bodied, shark-like fish with bulky heads and long, tapered tails; measured from the tail, they can grow up to 150 cm (4.9 ft) in length. Like other members of the class Chondrichthyes, chimaera skeletons are entirely cartilaginous, or composed of cartilage.
Henneguya zschokkei is found in fish as an ovoid spore with two anterior polar capsules and two long caudal appendages. [6] Individuals are very small (about 10 micrometers in diameter), [7] but are found aggregated into cysts 3–6 mm in diameter at any place in the animal's musculature.
A microscopic parasite was detected in the Druid Lake Reservoir in Baltimore, Maryland and vulnerable residents are being told to take precautions. Traces of Cryptosporidium were found in the lake ...
The parasite severs the blood vessels in the fish's tongue, causing the tongue to fall off. It then attaches itself to the remaining stub of tongue and the parasite itself effectively serves as the fish's new "tongue". [2] Many species of Cymothoa have been identified, [3] and only cymothoid isopods are known to consume and replace the host's ...