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Acyrtops beryllinus  (Hildebrand & Ginsburg, 1927)

Emerald clingfish
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Native range | All suitable habitat | Point map | Year 2100
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Acyrtops beryllinus   AquaMaps   Data sources: GBIF OBIS
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Image of Acyrtops beryllinus (Emerald clingfish)
Acyrtops beryllinus
Picture by Figueiredo, J.L./Menezes, N.A.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Gobiesociformes (Clingfishes) > Gobiesocidae (Clingfishes and singleslits) > Gobiesocinae
Etymology: Acyrtops: Greek, a = without + Greek, kyrtos, -e, -on = bent + Greek, ops = shape (Ref. 45335).

Environment / Climate / Range Ecology

Marine; reef-associated.   Tropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Western Atlantic: southern Florida, USA and Bahamas to Espírito Santo, Brazil (Ref. 57756).

Length at first maturity / Size / Weight / Age

Maturity: Lm ?, range 1 - 1.5 cm
Max length : 2.5 cm TL male/unsexed; (Ref. 7251); max. reported age: 1 years (Ref. 51567)

Biology     Glossary (e.g. epibenthic)

Spend the entire cycle in beds of turtle grass, Thalassia (Ref. 51567) usually attached to the underside of the blades of the seagrass (Ref. 7251). Feed on small crustaceans: Isopoda, Amphipoda, Harpacticoida, and Ostracoda (Ref. 5521). Multiple spawner (Ref. 51567).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Distinct pairing during copulation (Ref. 205). The pair swims side to side either head to head or head to tail. Their bodies flex as they swim making their caudal areas stroke each other. The male then makes slow undulating side to side movement interrupted by short, quick twitches signalling deposition of the eggs. Fertilization probably occurred between the time of release of eggs and the depositions. Deposition of an entire clutch of eggs takes from about 20 30 minutes in 3 minute intervals (Ref. 51567).

Main reference Upload your references | References | Coordinator : Williams, Jeffrey T. | Collaborators

Robins, C.R. and G.C. Ray, 1986. A field guide to Atlantic coast fishes of North America. Houghton Mifflin Company, Boston, U.S.A. 354 p. (Ref. 7251)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

FAO(Publication : search) | FisheriesWiki | Sea Around Us

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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.7500   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00550 (0.00238 - 0.01266), b=3.11 (2.91 - 3.31), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.3   ±0.46 se; Based on food items.
Resilience (Ref. 69278):  High, minimum population doubling time less than 15 months (K=2.42; tmax=1; assuming tm<1;).
Prior r = 0.66, 2 SD range = 0.2 - 2.14, log(r) = -0.42, SD log(r) = 0.59, Based on: 1 tgen, 1 tmax, 1 Fec records
Vulnerability (Ref. 59153):  Low vulnerability (10 of 100) .