Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Scombridae
(Mackerels, tunas, bonitos) > Scombrinae
Etymology: Euthynnus: Greek, eu = good + Greek, thynnos = tunna (Ref. 45335).
Environment / Climate / Range
Marine; brackish; reef-associated; oceanodromous (Ref. 51243); depth range 1 - 150 m (Ref. 28173). Tropical; 56°N - 30°S, 92°W - 42°E
Length at first maturity / Size / Weight / Age
Maturity: Lm 41.8  range ? - 60 cm
Max length : 122 cm TL male/unsexed; (Ref. 26340); common length : 80.0 cm TL male/unsexed; (Ref. 5217); max. published weight: 16.5 kg (Ref. 40637); max. reported age: 10 years (Ref. 28173)
(total): 15 - 16;
soft rays: 11 - 15;
Vertebrae: 39. Anterior spines of first dorsal fin much higher than the those mid-way, giving the fin a strongly concave outline. Interpelvic process small and bifid. Body naked except for corselet and lateral line. Swim bladder absent. Incipient protuberances on 33rd and 34th vertebrae. Back with broken oblique stripes (Ref. 168). Caudal peduncle with 7-8 finlets. Dark stripes on the back and with 3-7 dark spots between pelvic and pectoral fins (Ref. 35388).
Atlantic Ocean: in tropical and subtropical waters, including the Mediterranean, Black Sea, Caribbean Sea and Gulf of Mexico. Highly migratory species, Annex I of the 1982 Convention on the Law of the Sea (Ref. 26139).
Found in neritic waters close inshore (Ref. 13628). This schooling species is an opportunistic predator which feeds on virtually everything within its range, i.e. crustaceans, fishes (mainly clupeoid), squids, heteropods and tunicates. Eggs and larvae are pelagic (Ref. 6769). Specialized traps (madragues) are used in Tunisia and Morocco. Diving bird flocks may indicate large schools (Ref. 9710). Utilized fresh, dried-salted, smoked, canned and frozen (Ref. 9987). A popular game fish (Ref. 9710).
Collette, B.B. and C.E. Nauen, 1983. FAO Species Catalogue. Vol. 2. Scombrids of the world. An annotated and illustrated catalogue of tunas, mackerels, bonitos and related species known to date. Rome: FAO. FAO Fish. Synop. 125(2):137 p.
IUCN Red List Status (Ref. 90363)
CITES (Ref. 94142)
Threat to humans
Reports of ciguatera poisoning (Ref. 30303)
Fisheries: commercial; gamefish: yes
Estimates of some properties based on empirical models
Phylogenetic diversity index (Ref. 82805
= 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=-2.05000 (nan - nan), b=3.10 (2.96 - 3.24), based on LWR estimates for species & Subfamily-BS (Ref. 93245
Trophic Level (Ref. 69278
): 4.5 ±0.8 se; Based on diet studies.
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (K=0.13-0.22; tm=2; tmax=8; Fec=71,000).
Vulnerability (Ref. 59153
): High vulnerability (57 of 100) .