Actinopterygii (ray-finned fishes) > Atheriniformes
(Silversides) > Atherinopsidae
(Neotropical silversides) > Menidiinae
Etymology: Menidia: Greek, menoeides, -es, -es = like a half noon shape (Ref. 45335); beryllina: beryllina meaning emerald color (Ref. 10294).
Environment / Climate / Range
Marine; freshwater; brackish; pelagic-neritic; depth range 0 - ? m. Subtropical; 42°N - 25°N, 98°W - 70°W
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 15.0 cm TL male/unsexed; (Ref. 5723); common length : 7.8 cm TL male/unsexed; (Ref. 12193); max. reported age: 2 years (Ref. 72478)
Western Atlantic: Massachusetts to southern Florida in USA and around Gulf of Mexico to northeastern Mexico.
A brackish/marine species that ascends rivers (Ref. 86798). In fresh water, usually occurs at the surface of clear, quiet water over sand or gravel. Some landlocked populations, many of which have been established in impoundments as forage for sport fishes, reproduce in fresh water (Ref. 5723). Feeds on zooplankton (Ref. 10294).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Robins, C.R. and G.C. Ray, 1986. A field guide to Atlantic coast fishes of North America. Houghton Mifflin Company, Boston, U.S.A. 354 p. (Ref. 7251)
IUCN Red List Status (Ref. 96402)
CITES (Ref. 94142)
Threat to humans
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00468 (0.00198 - 0.01108), b=3.10 (2.90 - 3.30), based on LWR estimates for this Subfamily-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.2 ±0.3 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (tmax=1).
Vulnerability (Ref. 59153
): Low vulnerability (18 of 100) .