Actinopteri (ray-finned fishes) > Tetraodontiformes
(Puffers and filefishes) > Tetraodontidae
(Puffers) > Tetraodontinae
Etymology: Sphoeroides: Greek, sphaira = ball + Greek, suffix, oides = similar to (Ref. 45335).
More on authors: Bloch & Schneider.
Environment: milieu / climate zone / depth range / distribution range
Marine; brackish; demersal; depth range 10 - 183 m (Ref. 5951). Temperate; 54°N - 29°N
Western Atlantic: Newfoundland in Canada to northeastern Florida in USA.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 36.0 cm TL male/unsexed; (Ref. 7251); common length : 20.0 cm TL male/unsexed; (Ref. 3821)
Morphology | Morphometrics
soft rays: 7. Upper side grey or brown with poorly defined black spots and saddles. Belly yellow to white. Tiny jet-black pepper spots (about 1 mm in diameter) scattered over most of pigmented surface, particularly evident on cheeks. Lower sides with a row of black, elongate, bar-like markings. No lappets on head or body (Ref 53033).
Inhabits bays, estuaries and protected coastal waters. Sold as `sea squab' in northern part of range. Feeds primarily on shellfish, occasionally on finfish. Reportedly non-toxic.
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. 125652)
Threat to humans
Fisheries: minor commercial; aquarium: commercial
Estimates based on models
Preferred temperature (Ref. 123201
): 4.9 - 24.4, mean 9.3 °C (based on 71 cells).
Phylogenetic diversity index (Ref. 82804
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02188 (0.00984 - 0.04863), b=2.89 (2.72 - 3.06), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245
Trophic level (Ref. 69278
): 4.0 ±0.66 se; based on food items.
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (K=0.6).
Fishing Vulnerability (Ref. 59153
): Low vulnerability (24 of 100).
Climate Vulnerability (Ref. 125649
): Low vulnerability (22 of 100).
Nutrients (Ref. 124155
): Calcium = 71 [23, 171] mg/100g ; Iron = 0.459 [0.240, 0.938] mg/100g ; Protein = 17.5 [15.1, 19.8] % ; Omega3 = 1.15 [0.46, 2.92] g/100g ; Selenium = 18.7 [5.2, 53.3] μg/100g ; VitaminA = 10.1 [2.7, 40.1] μg/100g ; Zinc = 0.644 [0.383, 1.044] mg/100g (wet weight);