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Symphysanodon mona  Anderson & Springer, 2005

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

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Symphysanodontidae (Slopefishes)
Etymology: Symphysanodon: Greek, syn, symphysis = grown together + Greek, physis = growth body form + Greek, odous = teeth; related to few teeth which are located over the area where the two jaws meet (Ref. 45335);  mona: Named mona for its type locality (Mona Passage); feminine, noun in apposition to Symphysanodon.

Environment / Climate / Range Ecology

Marine; pelagic-oceanic; depth range ? - 384 m (Ref. 54833).   Tropical, preferred ?

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

Western Central Atlantic: known only from the type locality: Mona Passage off the west coast of Puerto Rico.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 8.6 cm SL male/unsexed; (Ref. 54833)

Short description Morphology | Morphometrics

Dorsal spines (total): 9; Dorsal soft rays (total): 10; Anal spines: 3; Anal soft rays: 7; Vertebrae: 25. The species differs from all other species of the genus in having fewer gillrakers on first arch (4 or 5 + 19-21 = 24 or 25 total vs. 8-14 + 20-29 = 28-42 total). In addition, it differs from other Atlantic species in having a ventral branch of obliquus dorsalis 3 muscle (vs. its absence in the other two species) and in having a posteriorly projecting extension of the cartilaginous lateral end of ceratobranchial 4 (vs. its absence in the other two species; S. berryi has a small accessory cartilage associated with the lateral end of ceratobranchial 4; the specimen of S. octoactinus examined may have had a very small accessory cartilage that was lost during dissection).

Biology     Glossary (e.g. epibenthic)

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Main reference Upload your references | References | Coordinator | Collaborators

Anderson, W.D. and V.G. Springer, 2005. Review of the perciform fish genus Symphysanodon Bleeker (Symphysanodontidae), with description of three new species, S. mona, S. parini, and S. rhax. Zootaxa 996:1-44. (Ref. 54833)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




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