Classification / Names
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Blenniiformes (Blennies) >
Tripterygiidae (Triplefin blennies) > Tripterygiinae
Etymology: Helcogramma: Greek, helkos, -eos, -ous = ulcer, sore + Greek, gramma = letter, mark (Ref. 45335); nesion: The specific epithet is from the Greek "nesion", meaning island. The name refers to the isolated island of scales on either side of the nape and is treated as Noun in apposition.
Environment: milieu / climate zone / distribuzione batimetrica / distribution range
Ecologia
marino benthopelagico; distribuzione batimetrica 3 - 10 m (Ref. 52308). Tropical
Northwest Pacific: Japan and the Ogasawara Islands, Okino-shima at the south-western tip of Shikoku Island.
Size / Peso / Age
Maturità: Lm ? range ? - ? cm
Short description
Chiavi di identificazione | Morfologia | Morfometria
Spine dorsali (totale) : 17 - 18; Raggi dorsali molli (totale) : 12 - 13; Spine anali: 1; Raggi anali molli: 20 - 22. With 1-2 symphysial mandibular sensory pores, second dorsal fin spines XIV, third dorsal fin segmented rays 11, last ribs on vertebral centrum 10, vertebrae 10+28 or 29=38 or 39, pored lateral line scales typically 25 to 27, nape scales absent, small isolated patch of scales on either side of nape, each patch surrounded by naked area.
Body shape (shape guide): elongated; Cross section: oval.
Female members of the Tripterygiidae have eggs that 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
Maturità | Riproduzione | Deposizione | Uova | Fecundity | Larve
Williams, J.T. and J.C. Howe, 2003. Seven new species of the triplefin fish genus Helcogramma (Tripterygiidae) from the Indo-Pacific. aqua, J. Ichthyol. Aquat. Biol. 7(4):151-176. (Ref. 52308)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Threat to humans
Harmless
Human uses
Strumenti
Special reports
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Fonti Internet
Estimates based on models
Phylogenetic diversity index (Fonte Biblio.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00617 (0.00288 - 0.01322), b=3.04 (2.86 - 3.22), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Fonte Biblio.
69278): 3.1 ±0.3 se; based on size and trophs of closest relatives
Resilienza (Fonte Biblio.
120179): Alto, tempo minimo di raddoppiamento della popolazione meno di 15 mesi (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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