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Ovalentaria/misc (Various families in series Ovalentaria) >
Pomacentridae (Damselfishes) > Chrominae
Etymology: Chromis: Greek, chromis = a fish, perhaps a perch (Ref. 45335); oligactis: Name 'oligactis' from a Greek word meaning 'few-rayed', in reference to the unusually low number of rays in P and in the soft parts of D and A, which is a characteristic feature of the new species.
Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied
Ecologie
marien rifbewoner; standvastig; diepte 30 - 40 m (Ref. 137825). Tropical
Western Central Pacific: Vietnam.
Grootte / Gewicht / Leeftijd
Maturiteit: Lm ?  range ? - ? cm
Max length : 7.9 cm SL mannelijk / geslacht onbekend; (Ref. 137825)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale stekels (totaal) : 14; Dorsale zachte stralen (totaal) : 10; Anale stekels: 2; Anale zachte stralen: 10; Wervels: 26. This species is distinguished from its congeners by the following set of characters: 14 spinous rays in D, 10 branched rays in D and A, 16-17 rays in P; 3 spiniform procurrent rays in the upper and lower lobe of C; 26 gill-rakers in the outer row on the first arch; 19 perforated scales in the anterior lateral line; maximum body depth, which fits 2.2 times in SL; a small dark spot at the base of P, without prominent light or black areas or a contrasting pattern on the body in preserved specimens (Ref. 137825).
Body shape (shape guide): short and / or deep; Cross section: compressed.
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Prokofiev, A.M. and D.A. Astakhov, 2023. New species of the Damselfish genus Chromis (Pomacentridae) from Vietnam. J. Ichthyol. 63(2):365-370. (Ref. 137825)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: van geen belang
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Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01778 (0.00800 - 0.03953), b=3.00 (2.82 - 3.18), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.0 ±0.1 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
120179): Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (Preliminary K or Fecundity.).
Kwetsbaarheid van de visserij (Ref.
59153): Low vulnerability (10 of 100).
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