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Helcogramma aquila, Darktail triplefin
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Common name (e.g. trout)
Genus + Species (e.g. Gadus morhua)
Darktail triplefin
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Helcogramma aquila
Male picture by
Williams, J.T.
Teleostei (teleosts) >
Blenniiformes
(Blennies) >
Tripterygiidae
(Triplefin blennies) > Tripterygiinae
Etymology:
Helcogramma:
Greek, helkos, -eos, -ous = ulcer, sore + Greek, gramma = letter, mark (Ref.
45335
)
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal; depth range 0 - 6 m (Ref.
27223
). Tropical
Western Central Pacific: Japan, Philippines and Guam.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 4.1 cm SL male/unsexed; (Ref.
95023
); 3.3 cm SL (female)
Short description
Morphology
|
Morphometrics
Dorsal
spines
(total): 16 - 18;
Dorsal
soft rays
(total): 11;
Anal
spines
: 1;
Anal
soft rays
: 19 - 20;
Vertebrae
: 37. Distinguished by the following characters: 5-8 symphyseal mandibular sensory pores; second dorsal fin spines XIII-XIV; last pleural ribs on vertebral centrum 11, vertebrae 11+ 26 = 37; nape naked (Ref.
9849
); black lower half of head; bright blue stripe extending from anterior part of upper lip to preopercular margin through ventral margin of orbit; dorsal fins black distally; central part of pectoral fin base black; entire caudal fin black (Ref.
95023
).
Adults are found among rocky boulders and in surge channels to a depth of about 6 m (Ref.
9849
). Eggs are hemispherical and covered with numerous sticky threads that anchor them in the algae on the nesting sites (Ref.
240
). Larvae are planktonic which occur primarily in shallow, nearshore waters (Ref.
94114
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Williams, J.T. and C.J. McCormick
, 1990. Two new species of the triplefin fish genus
Helcogramma
(Tripterygiidae) from the Western Pacific Ocean. Copeia 1990(4):1020-1030. (Ref.
9849
)
IUCN Red List Status (Ref.
126983
)
Least Concern (LC)
; Date assessed:
03 May 2010
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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