Main Ref. | Collette, B.B. and C.E. Nauen, 1983 |
Utseende refererar till | |
Bones in OsteoBase |
specialiserade organ | |
annat utseende | |
andra färger | |
Anmärkningar |
Särskilt slående egenskaper | none |
Lateral kroppsform | fusiform / normal |
Tvärsnitt | oval |
Dorsal profil av huvudet | more or less straight |
Ögontyp | more or less normal |
Typ av mun/snyte | more or less normal |
Munnens placering | terminal |
Type of scales | |
Diagnos |
A very large species, deepest near the middle of the first dorsal fin base. The second dorsal fin higher than the first; the pectoral fins are very short, less than 80% of head length. Swim bladder present. Lower sides and belly silvery white with colorless transverse lines alternated with rows of colorless dots. The first dorsal fin is yellow or bluish; the second reddish-brown; the anal fin and finlets dusky yellow and edged with black; the median caudal keel is black in adults. May be confused with several other tunas, these are typically much smaller and easily distinguished by specific patterns of stripes, bands or dots. |
Ease of Identification |
Sidolinjer | avbruten: No |
Fjäll längs sidolinje | |
Porbärande fjäll längs sidolinje | |
Fjäll i lateralserie | |
Antal rader fjäll ovan sidolinje | |
Antal rader fjäll under sidolinje | |
Fjäll runt stjärtfensspole | |
Skäggtömmar | 0 |
Gälspringor (endast hos hajar/rockor) | |
Gälräfständer | |
på undre del av gälbåge | |
på övre del av gälbåge | |
totalt | 34 - 43 |
Ryggkotor | |
preanal | 18 - 18 |
totalt | 39 - 39 |
Egenskaper | no striking attributes |
Antal fenor | 2 |
Antal småfenor | Dorsal 8 - 10 |
Ventral 7 - 9 | |
Totalt antal hårda fenstrålar | 12 - 14 |
Totalt antal mjuka fenstrålar | 13 - 15 |
Fettfena | absent |
Egenskaper | forked; more or less normal |
Antal fenor | 1 |
Totalt antal hårda fenstrålar | 0 - 0 |
Totalt antal mjuka fenstrålar | 13 - 16 |
Bröstfena | Egenskaper more or less normal |
Fenstrålar hårda | |
Fenstrålar mjuka | |
Bukfenor | Egenskaper more or less normal |
Position thoracic beneath origin of D1 | |
Fenstrålar hårda | |
Fenstrålar mjuka |