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Hydrolagus affinis (deBritoCapello, 1868)

Smalleyed rabbitfish
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Hydrolagus affinis   AquaMaps   Data sources: GBIF OBIS
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Image of Hydrolagus affinis (Smalleyed rabbitfish)
Hydrolagus affinis
Picture by Mouritsen, R.


United States (contiguous states) country information

Common names: Atlantic chimaera, Deepwater chimaera
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Also Ref. 6680.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/us.html
National Fisheries Authority: http://www.nmfs.gov
Occurrences: Occurrences Point map
Main Ref: Haedrich, R.L. and N.R. Merrett, 1988
National Database:

Common names from other countries

Classification / Names Κοινά ονόματα | Συνώνυμα | Catalog of Fishes(Γένος, Είδη) | ITIS | CoL | WoRMS | Cloffa

Ολοκέφαλοι (χίμαιρες) (chimaeras) > Chimaeriformes (Chimaeras) > Chimaeridae (Shortnose chimaeras or ratfishes)
Etymology: Hydrolagus: hydro-, combining form of hydor (Gr.), water; lagos (Gr.), hare, i.e., “water rabbit,” probably referring to three pairs of tooth plates, which tend to protrude from the mouth like a rabbit’s incisors. (See ETYFish);  affinis: Latin for related, referring to its similarity to Chimaera monstrosa. (See ETYFish).

Environment: milieu / climate zone / depth range / distribution range Οικολογία

Θαλασσινό(ά) βαθύβιο(ς); εύρος βάθους 300 - 3000 m (Ref. 117245).   Deep-water; 70°N - 58°S, 80°W - 41°E

Κατανομή Χώρες | Περιοχές FAO | Οικοσυστήματα | Παρουσίες | Point map | Εισαγωγές | Faunafri

Northeast Atlantic: Rockall Trough along Ireland, northern Bay of Biscay and off Portugal. Reported from Iceland (Ref. 12462). Southwest Atlantic: Uruguay (Ref. 58839). Northwest Atlantic: Newfoundland in Canada to Cape Cod in USA. Probably has a much wider distribution. Possibly occurring off the Cape in South Africa and off Mozambique (Ref. 11228).

Μέγεθος / Βάρος / Age

Maturity: Lm ?  range ? - ? cm
Max length : 130 cm TL αρσενικό/απροσδιόριστο; (Ref. 4443); 125.0 cm TL (female)

Short description Μορφολογία | Μορφομετρία

Lacks a separate anal fin. Pectoral fin does not overlap pelvic fin. Short caudal filament. Dark brown in color (Ref. 6902).

Βιολογία     Γλωσσάρι (π.χ. epibenthic)

Epibenthic (Ref. 58426). Found on continental slopes and down to deep-sea plains. Reported down up to 3000 m along the mid-Atlantic ridge (Ref. 83979, C.Cotton pers.comm. 03/10). Feeds on small fishes and invertebrates (Ref. 6680). Oviparous (Ref. 205). Eggs are encased in horny shells (Ref. 205). It is commercially used as fish meal and to produce high-quality machine oil from the liver (Ref. 117245).

Life cycle and mating behavior Γεννητική Ωρίμανση | Αναπαραγωγή | Γεννοβολία | Αβγά | Γονιμότητα | Προνύμφες

Oviparous (Ref. 205).

Main reference Upload your references | Αναφορές | Συντονιστής | Συνεργάτες

Hardy, G.S. and M. Stehmann, 1990. A new deep-water ghost shark, Hydrolagus pallidus n.sp. (Holocephali, Chimaeridae), from the eastern North Atlantic, and redescription of Hydrolagus affinis (Brito Capello, 1867). Arch. Fisch. Wiss. 40(3):229-248. (Ref. 3330)

IUCN Red List Status (Ref. 130435)

  Least Concern (LC) ; Date assessed: 02 September 2019

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless




Human uses

αλιεία: χωρίς ενδιαφέρον
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Διαδικτυακές πηγές

Estimates based on models

Preferred temperature (Ref. 115969): 3.3 - 4.3, mean 3.5 (based on 57 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00282 (0.00118 - 0.00673), b=3.10 (2.89 - 3.31), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Τροφικό Επίπεδο (Ref. 69278):  4.3   ±0.41 se; based on food items.
Ελαστικότητα (Ref. 120179):  Χαμηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού 4,5 - 14 έτη (Assuming Fec <100).
Fishing Vulnerability (Ref. 59153):  Very high vulnerability (78 of 100).