Striped cusk-eel

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Striped cusk-eel
Striped cusk-eel.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Ophidiiformes
Family: Ophidiidae
Genus: Ophidion
Species:
O. marginatum
Binomial name
Ophidion marginatum
DeKay, 1842
Synonyms
  • Ophidium marginatumDeKay, 1842
  • Rissola marginata(DeKay, 1842)

The striped cusk-eel (Ophidion marginatum) is a species of fish in the family Ophidiidae. It is found in the northwest Atlantic.

Contents

Description

The striped cusk-eel is named as such due to its lateral line, which stops before the base of the tail and has a noticeably different shade than the rest of its body, which is a gray-green shade.

This species has an elongated, laterally compressed body with the profile of the head being almost straight from the tip of the moderately pointed snout to behind its eye. The snout just points beyond the mouth and has a spine projecting down near its tip. The male has a prominent crest on the nape. The dorsal and anal fins are joined to the caudal fin. The dorsal fin has 147–158 rays, the anal fin 118–124 rays and each pelvic fin has two rays of unequal length and inserted under eye. The scales are smooth and elongated, they do not overlap and there are none on the head. It is grey-green above, golden on the flanks and white below; there are 2–3 dark stripes along the entire length of the body with one along the lateral line. The side of head has brown spots, the dorsal is fin pale green with a black margin and the anal fin also has a black margin. [2]

It can grow up to 25 centimetres (9.8 in) long. [3]

Distribution and habitat

The striped cusk eel occurs from the northern Atlantic waters off the United States, ranging from New England to northeastern Florida. [1] Larvae occupy the continental shelf of the United States, while a mixture of larvae and juveniles have been reported to occur in estuaries from Barnegat to Chesapeake Bay.

Biology

The stripe cusk-eel is a benthic species which burrows tail first into soft substrates such as sand or mud. They remain hidden during the day and come out of their burrows at night to hunt. They occur in inshore waters in Spring and Fall but their wintering habits are little known, they may move offshore or they may be inactive and remain buried in the substrate. [4] They feed on small crustaceans and fishes smaller than themselves. [5]

The swim bladder, anterior vertebrae and the dorsal cranial muscles have been modified to form a drum like sound generator, this is sexually dimorphic with the apparatus being different in each sex. Older juvenile and adult males show a lump on the head caused by hypertrophy of the muscles used to make the drumming sounds they use in courtship. Spawning for the striped cusk eel begins in the summer. Courting and spawning rituals include the creation of sound and close, synchronized movements from a breeding pair. Females can release small containers of eggs nightly for up to two months after the breeding process has finished. [4]

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References

  1. 1 2 Robins, R.H. (2015). "Ophidion marginatum". The IUCN Red List of Threatened Species . 2015: e.T190213A16510587. doi: 10.2305/IUCN.UK.2015-4.RLTS.T190213A16510587.en .
  2. "Species: Ophidion marginatum, Striped cusk-eel". Shorefishes of the Greater Caribbean online information system. Smithsonian Tropical research Institute. Retrieved 15 July 2018.
  3. Froese, Rainer; Pauly, Daniel (eds.). "Ophidion marginatum". FishBase . December 2012 version.
  4. 1 2 Edward O. Mardy; John A. Musick (2013). Field Guide to Fishes of the Chesapeake Bay. JHU Press. pp. 109–110. ISBN   9781421407685 . Retrieved 15 July 2018.
  5. "Net Notes July/August 2010". Juvenile Fish and Blue Crab Survey. Virginia Institute of Marine Science. Retrieved 15 July 2018.