Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Gobiidae
(Gobies) > Gobionellinae
Etymology: ios: From the Latin ios, meaning 'arrow' (Ref. 27436).
Environment / Climate / Range
Marine; brackish; demersal; depth range 0 - 2 m (Ref. 96339). Subtropical, preferred ?; 55°N - 22°N, 136°W - 111°W
Eastern Pacific: Rivers Inlet, British Columbia, Canada to Baja California, Mexico.
Size / Weight / Age
Maturity: Lm ?  range ? - 3.4 cm
Max length : 6.4 cm SL male/unsexed; (Ref. 27436); common length : 4.2 cm TL male/unsexed; (Ref. 12193); max. reported age: 3 years (Ref. 72494)
Inhabits sand or mud bottom. Retreats into shrimp burrows when threatened and at low tide (Ref. 6885). Commonly in estuaries, lagoons and tidal sloughs. Reported to occur in freshwater. Adults feeds on diatoms, green algae, tintinnids, eggs and young of their hosts (Ref. 6885). Positions large food particles near crabs to be torn to smaller pieces (Ref. 6885). Preyed upon by Sebastes, staghorn sculpin, whitespot greenling, and terns (Ref. 6885). Unlike other gobies, it does not build a nest or care for its young (Ref. 2850).
Eschmeyer, W.N., E.S. Herald and H. Hammann, 1983. A field guide to Pacific coast fishes of North America. Houghton Mifflin Company, Boston, U.S.A. 336 p. (Ref. 2850)
IUCN Red List Status (Ref. 109396)
CITES (Ref. 94142)
Threat to humans
Aquarium: public aquariums
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00832 (0.00371 - 0.01866), b=3.07 (2.88 - 3.26), based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.1 ±0.42 se; Based on food items.
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (tm=1; tmax=2.5).
Prior r = 0.75, 2 SD range = 0.35 - 1.63, log(r) = -0.29, SD log(r) = 0.39, Based on: 1 tgen, 1 tmax, 1 Fec records
Vulnerability (Ref. 59153
): Low vulnerability (15 of 100) .