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Larval anisakids are common parasites of marine and anadromous fish (e.g. salmon, sardine), and can also be found in squid and cuttlefish. In contrast, they are absent from fish in waters of low salinity, due to the physiological requirements of krill , which are involved in the completion of the worm's life cycle.
When their population becomes high, the worms migrate toward the surface of the water for access to higher concentrations of oxygen. [ citation needed ] Although detritus worms may not cause harm to aquarium fish, their appearance is an indication of poor water quality mainly due to overfeeding and lack of good water sanitation.
Some internal fish parasites are spectacular, such as the philometrid nematode Philometra fasciati which is parasitic in the ovary of female Blacktip grouper; [14] the adult female parasite is a red worm which can reach up to 40 centimetres in length, for a diameter of only 1.6 millimetre; the males are tiny.
The suitability of paratenic hosts in facilitating transmission differs according to species, with physostome (open swimbladder) fish being less suitable than physoclist (closed swimbladder) fish. The latter allow further development of A. crassus larvae into the fourth stage and have lower rates of encapsulation, thereby permitting longer ...
The free-living nematode Panagrellus redivivus (sour paste nematode, [2] or beer mat nematode from its occurrence in constantly moist felt beer mats), [1] is known to many aquarium enthusiasts and fish keepers as the microworm. It is a tiny roundworm used as the first food for larger kinds of newly-hatched fish, such as larval common carp. [3]
The name literally translates as "the fish louse with many children". The parasite can infect most freshwater fish species and, in contrast to many other parasites, shows low host specificity. It penetrates gill epithelia, skin and fins of the fish host and resides as a feeding stage (the trophont) inside the epidermis.
A British Olympic swimmer claims athletes at the Paris Olympics have found worms in fish they were served in the Olympic Village cafeteria.. On Aug. 6, Adam Peaty spoke to U.K. news outlet i about ...
Tubifex worms are often used as a live food for fish, especially tropical fish and certain other freshwater species. They have been a popular food for the aquarium trade almost since its inception, and gathering them from open sewers for this purpose was quite common until recently.