A Hydroid Parasitic on a Fish

  title={A Hydroid Parasitic on a Fish},
  author={Jesse Walter Fewkes},
  • J. Fewkes
  • Published 1 October 1887
  • Geology
  • Nature
DURING my studies the past summer at the Newport Marine Laboratory I captured a single specimen of an osseous fish, Seriola zonata, Cuv., which exhibits a most interesting example of parasitism or possibly commensalism. Upon the outer wall of its body an extraordinary hydroid was found to have attached itself. As this mode of life is unique for a hydroid, it is thought that a mention of it, and a statement of the peculiar modifications which the hydroid has suffered, may be not without interest… 
II.—Association between sessile colonial hydroids and fishes
There is a symbiosis between Sertularia operculata and Squalus acanthias, and between Seralia lendigera and Hippocampus ramulosus; and the facts would seem to indicate that this is a purposive or obligate symbiosis.
The life cycle of Hydrichthys mirus (Cnidaria: Hydrozoa: Anthomedusae: Pandeidae)
The previously unknown life cycle of the parasitic hydroid Hydrichthys mirus is described and it is suggested that Stomotoca has hitherto constituted a polyphyletic taxon, embracing parallel lineages of pandeids, each retaining juvenile features.
Brinckmannia hexactinellidophila, n. gen., n. sp.: a hydroid living in tissues of glass sponges of the reefs, fjords, and seamounts of Pacific Canada and Alaska
An intimate association of a cnidarian with glass sponges of the genus Heterochone were found to regularly contain numerous tiny hydroids in their tissue, leading to a new genus and species, named Brinckmannia hexactinellidophila, which is a reduced form, lacking tentacles and gonophores.
The life cycle of Catablema vesicarium (A. Agassiz, 1862) (Hydrozoa, Pandeidae)
The previously unknown life cycle of boreal-Arctic pandeid hydrozoan Catablema vesicarium was elucidated under experimental conditions and the data on temperature range of medusae appearing in experiments may be potentially useful for studying seasonality of jellyfish in the sea.
Some anthoathecate hydroids and limnopolyps (Cnidaria, Hydrozoa) from the Hawaiian archipelago
A systematic account is given of 17 families, 25 genera, and 32 species of anthoathecate hydroids and limnopolyps reported from Hawaii. Applying Reversal of Precedence provisions in zoological
Hydromedusae observed during night dives in the Gulf Stream
Hydromedusae were photographed and collected during 75 night-time dives in the Gulfstream off Florida to obtain DNA extracts and subsequently to determine part of the mitochondrial 16S rRNA gene, a barcode marker preferentially used for hydrozoans.
Athecate hydroids from Puerto Rico and the Virgin Islands
About 31 athecate hydroids collected from Puerto Rico and the vicinity are recorded, 9 for the first time in the Caribbean Sea. Two new genera, Heterocoryne and Millardiana, and four new species,