Actinopterygii (ray-finned fishes) > Osmeriformes
(Smelts) > Retropinnidae
(New Zealand smelts) > Retropinninae
Etymology: Retropinna: Latin, retro = backwards, on the back side + Latin, pinna = thorn (Ref. 45335).
Environment / Climate / Range
Marine; freshwater; brackish; demersal; anadromous (Ref. 51243). Subtropical; 34°S - 47°S (Ref. 26213)
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 8.6 cm FL male/unsexed; (Ref. 13730)
Southwest Pacific: endemic to New Zealand.
Migrates into estuaries and lower reaches of rivers during spring.
McDowall, R.M., 1990. Freshwater fishes and fisheries of New Zealand -The angler's el dorado. Aquat. Sci. 2(2):281-341.
IUCN Red List Status (Ref. 90363)
Threat to humans
Fisheries: of no interest; bait: usually
CollaboratorsPicturesStamps, CoinsSoundsCiguateraSpeedSwim. typeGill areaOtolithsBrainsVision
Estimates of some properties based on empirical models
Phylogenetic diversity index (Ref. 82805
= 0.6406 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), based on all LWR estimates for this BS (Ref. 93245
Trophic Level (Ref. 69278
): 3.2 ±0.39 se; Based on food items.
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (25 of 100) .