Actinopteri (ray-finned fishes) > Blenniiformes
(Blennies) > Chaenopsidae
(Pike-, tube- and flagblennies)
Etymology: Chaenopsis: Greek, chaeno = to yawn + Greek, opsis = appearance (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Marine; reef-associated; depth range 3 - 30 m (Ref. 11482), usually - m (Ref. ). Tropical; 0°C -
Eastern Central Pacific: Costa Rica to Colombia and the Galapagos Islands.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 8.0 cm TL male/unsexed; (Ref. 11482)
Lives in worm tubes on sand and rubble bottoms (Ref. 11482). Males are territorial and vigorously defend their worm tube homes. When courting, the male will assume the S-shape position and dart quickly back and forth from their place of shelter. When threatened, it opens its enormous mouth, which significantly increases its apparent size to the invader (Ref. 28023).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Allen, G.R. and D.R. Robertson, 1994. Fishes of the tropical eastern Pacific. University of Hawaii Press, Honolulu. 332 p. (Ref. 11482)
IUCN Red List Status (Ref. 124695)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 22.3 - 29.1, mean 26.8 °C (based on 251 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5010 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00102 (0.00046 - 0.00225), b=3.06 (2.88 - 3.24), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.5 ±0.5 se; based on size and trophs of closest relatives
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .