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Gobiiformes (Gobies) >
Microdesmidae (Wormfishes) > Ptereleotrinae
Etymology: Nemateleotris: Name from the combination of the Greek 'nemat' meaning thread, and the eleotrid genus Eleotris; helfrichi: Named for Dr. Philip Helfrich, Associate Director of the Hawaii Institute of Marine Biology of the University of Hawaii and Director of the Enewetak Marine Biological Laboratory.
Eponymy: Dr Philip Helfrich (d: 1927) is a marine biologist. [...] (Ref. 128868), visit book page.
More on authors: Randall & Allen.
Environment: milieu / climate zone / djupintervall / distribution range
Ekologi
marina revassocierade; djupintervall 0 - 90 m (Ref. 33482), usually 40 - ? m (Ref. 9710). Tropical; 16°N - 28°S
Southeastern Pacific: Fr. Polynesia.
Size / Vikt / Age
Könsmognad: Lm ? range ? - ? cm
Max length : 6.0 cm TL hane/ej könsbestämd; (Ref. 9710)
Short description
Bestämningsnycklar | Morfologi | Morfometri
Taggstrålar i ryggfenan (totalt) : 7; Mjukstrålar i ryggfenan (totalt) : 29 - 30; Taggstrålar i analfenan: 1; Mjukstrålar i analfenan: 25 - 27. This species is distinguished by the following characters: D VI, I,30 (I,29-30); A I,26 (I,25-27); pectoral-fin rays 20 (20-21); pelvic-fin rays I,5; segmented caudal-fin rays 17; upper procurrent caudal-fin rays 9 (9-14); lower procurrent caudal-fin rays 12 (11-12); total caudal-fin rays 37-43; gill rakers 6 (5-7) + 17 (17-18) = 23 (22-24). Colouration: elevated part of first dorsal fin blue on anterior edge; median fins are pale yellowish green, caudal fin no markings, outermost edge of second dorsal and anal fin tipped with a yellow or orange spot, one in each interradial membrane space, the spots sometimes coalescing; when alive the body is lavender to lilac; pelvic fins black-tipped; dorsal edge of iris with a black mark at 1 o’clock position, sometimes continuing until interorbital space as a short streak; maxilla black (when alive and preserved); snout bright pink in life (Ref. 128599).
Cross section: compressed.
Occurs in relatively deep water. Found over small patches of sand, rubble, or hard open bottoms of steep seaward reefs. Rarely found in less than 40 m and frequently occurs in pairs. Monogamous (Ref. 52884). Feeds on zooplanktons (Ref. 89972). Minimum depth reported taken from Ref. 128797.
Life cycle and mating behavior
Könsmognad | Reproduktion | Lek | Ägg | Fecundity | Larver
Monogamous mating is observed as both obligate and social (Ref. 52884).
Tea, Y.-K. and H.K. Larson, 2023. Synopsis of the ptereleotrine goby genus Nemateleotris, with description of a new species from the western and central Pacific Ocean (Teleostei: Gobiidae). Raffles Bulletin of Zoology 71:248-266. (Ref. 128599)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Threat to humans
Harmless
Human uses
Fiskeri: kommersiell; Akvarium: Kommersiell
Verktyg
Special reports
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Estimates based on models
Preferred temperature (Ref.
123201): 25.7 - 29, mean 27.8 °C (based on 13 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5625 [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), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Trofisk nivå (Ref.
69278): 3.4 ±0.45 se; based on food items.
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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![Image of Nemateleotris helfrichi (Helfrichs\](/images/thumbnails/jpg/tn_Nehel_u9.jpg "Image of Nemateleotris helfrichi (Helfrichs\")
