Chasmodes longimaxilla
Stretchjaw Blenny
Collection Details
Specimens
Photos
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Records
Taxonomic Hierarchy
Actinopterygii (Ray-finned Fishes)
Perciformes (Perciformes, Also Called the Acanthopteri)
Blenniidae (Combtooth Blennies)
Chasmodes
Chasmodes longimaxilla (Stretchjaw Blenny)
Description
This species account was compiled from
Composite (multiple sources) (McEachran, J.D. and J.D. Fechhelm. Fishes of the Gulf of Mexico. University of Texas Press, Austin.)
and processed using AI-assisted text extraction.
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Characters
Gill slit restricted; lower jaw lacking prominent lip flaps; supraorbital cirri absent or obsolete in adults; dorsal profile of head moderately sloping and slightly convex; snout acute; upper lip with narrow free dorsal margin discontinuous over center of jaw; anterior naris tubular with filamentous flap; cirrus on dorsal surface of eye simple, decreasing in size with growth; jaw teeth closely packed and acutely pointed; vomer and palatine toothless; gill membranes broadly joined to isthmus; gill rakers on first arch 9-12 (modally 11); head length 29.2%-33% SL; snout length 7.2%-8.8% SL; eye diameter 5.1%-6.1% SL; interorbital width 2.9%-3.8% SL; maxillary length 14%-22.5% SL; gill opening length 5.1%-8% SL; body depth at pelvic insertion 24%-26.1% SL; caudal peduncle depth 7.4%-8.3% SL; pectoral fin rays 11-13 (usually 12); dorsal fin XI, 16-19 (usually 18 or 19); pelvic fin I, 3; anal fin II, 16-20 (usually 18 or 19); caudal fin with 10 or 11 segmented rays
Olivaceous with light stripes or mottling; iridescent blue spot on membrane between first and second dorsal fin spines; orange streak from spot to about tenth spine
Distribution
Western Atlantic in the Gulf of Mexico from Pensacola to Veracruz
Habitat Associations
Associated with oyster beds
Oyster beds
Biology
Maximum known size is 86 mm SL
Oviparous. Eggs are demersal and adhesive (Ref. 205), and are attached to the substrate via a filamentous, adhesive pad or pedestal (Ref. 94114). Larvae are planktonic, often found in shallow, coastal waters (Ref. 94114).
Reproductive mode: dioecism; fertilization: external; guarders. Oviparous, distinct pairing (Ref. 205).
IUCN Red List Status: Least Concern (LC), assessed 2011-08-11. Resilience: High (Preliminary K or Fecundity.).
Phylogeny and Morphologically Similar Fishes
Very similar to C. bosquianus, which occurs from New York to northeastern Florida
References
Springer 1959a
Williams 1983 (as C. bosquianus longimaxilla)
Robins and Ray 1986
Boschung 1992
Smith 1997
Castro-Aguirre et al. 1999
Williams 2002e
Breder, C.M. and D.E. Rosen (1966) Modes of reproduction in fishes. T.F.H. Publications, Neptune City, New Jersey. 941 p.
Williams, J.T. (2002) Blenniidae. Combtooth blennies. p. 1768-1772. In K.E. Carpenter (ed.) FAO species identification guide for fishery purposes. The living marine resources of the Western Central Atlantic. Vol. 3: Bony fishes part 2 (Opistognathidae to Molidae), sea turtles and marine mammals.
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