Albacore tuna (Thunnas alalunga) is one of the most sought after fish around the world, both commercially and recreationally, and are classified as a Highly Migratory Species (HMS). In the United States they are managed federally by National Marine Fisheries Service (NMFS) in cooperation with state fish and wildlife agencies. To avoid overfishing albacore, NMFS and the State Department work through international management forums to regulate tuna fisheries. To help keep albacore from becoming overfished, NMFS must work with international agencies in regulating or capping tuna catches in the U.S. The United States is a member of the Inter-American Tropical Tuna Commission (IATTC) which is composed of 15 countries who have banded together to make recommendations for the conservation of tunas and other HMS.
Dorsal spines (total): 8 – 11; Dorsal soft rays (total): 12; Anal spines: 0; Anal soft rays: 12. Head longer than body depth. Maxilla partly concealed, covered by lachrymal bone but extending to about hind margin of eye. Bristles on longest gill raker 105 on one side in specimens of 12.7 cm, 140 in 16 cm, and 160 in 19 cm fork length specimens. A black spot on body near lower margin of pectoral fin. Interpelvic process small and single. Swim bladder present. Anal spine rudimentary.
Skipjack tuna grows up to a length of 1m and they weigh around 18kg. Similar to other tunas, skipjack tuna has a spindle-shaped body and is mostly without scales. It has two dorsal fines, one with the spines and one without it. Several finlets follow the second dorsal fin. The anal fin is just beneath the second dorsal fin and is followed by finlets. The posterior peduncle consist of three keels; the larger one between the two smaller ones.
The skipjack tuna fish has a distinguishing dark lines extending towards the tail from behind the corselet back. They have a silvery lower flank and belly. It has a deep purplish blue back. Their teeth are conical in a single row.
Common / Maori name : northern spiny dogfish
Scientific name : Squalus griffini Phillipps, 1931
Class : Chondrichthyes
Order : Squaliformes
Family : Squalidae
Genus : Squalus
Dimensions : TL (minimum): 880mm (length), TL (maximum): 1018mm (length)
Indo-Pacific sailfish () can be found in both temperate and tropical waters throughout the world's oceans. They generally have a tropical distribution and are particularly abundant near the equatorial regions of the Atlantic, Pacific, and Indian Oceans from 45° to 50° N in the western North Pacific and from 35° to 40° N in the eastern North Pacific to approximately 35° S in the eastern South Pacific. In the western Indian Ocean and in the eastern Indian Ocean, Indo-Pacific sailfish range between 45° to 35° S, respectively.
Dorado, Dolphinfish, Mahi Mahi – Coryphaena hippurus. Common Names: This fish is called by a number of names: dorado (West Coast SoCal and Mexico); dolphinfish (East Coast and much of U.S.); mahi mahi (Hawaii), and shiira (Japan).
Identifying Characteristics and Biology
- The dorado is brilliantly colored. When seen in the water, iridescent colors of blues, greens and yellows are present, and almost appear to be neon or electric in color.
- They are spotted with blue/green/black combinations all over the body.
- Deeply forked tail is typically yellow.
- The dorado’s body is very slender, and a blunt, flat head signifies it is a male.
- This species of fish is a very fast growing fish, typically living up to 4 years and growing up to 7 feet long
Widely distributed in tropical to warm temperate seas, but records are spotty due in part to confusion with the Shortfin Mako (Isurus oxyrinchus); fairly common in the western Atlantic (Gulf Stream waters, northern Cuba to southeastern Florida) and possibly in the central Pacific (near Phoenix Island and north of Hawaii), but apparently rather rare elsewhere; recent records from off northwestern Africa and the Iberian Peninsula, from the northern Gulf of Mexico to the Grand Banks, and off New South Wales, Australia.
Black marlin are a member of the family Istiophoridae. They possess a long, pointed bill, a retractable dorsal fin and a rigid pectoral fin, which cannot be pressed against the side of the body. Black marlin have two keels on either side of the tail base. Their name is derived from the colouration they take on when dead. Unlike blue (Makaira mazara) and striped marlin (Tetrapturus audax), black marlin do not usually have any blotches or stripes along the body. Juvenile black marlin feed on tropical pilchards and herring while adults feed on trevally, tuna-like fishes and scad. Black marlin are not normally dangerous, but have been known to attack boats and floating objects by impaling them with their bill.
Distribution – Narrow-barred mackerel, known internationally as Tanguigue, inhabit coastal waters from Perth, Western Australia, around the Top End to Bermagui in NSW. Spanish mackerel have also been caught in Victorian and Tasmanian waters.
Size – This is the largest of the Australian mackerels, reaching a maximum length of approximately 2.4 metres and 70 kg in weight.
Characteristics – The upper body varies from bright blue to dark grey in colour that fades to a silvery-blue over the sides. More than 40 narrow grey-blue wavy, vertical bars are present on each side of the fish. The large dip in the lateral line below the second dorsal fin is a clear diagnostic feature of the narrow-barred mackerel.
Confusing species – Similar in appearance to wahoo. Narrow-barred mackerel have less dorsal fin spines (15-18 compared with 23-27), the second dorsal fin is located closer to the centre of the body and they have a more prominent fork in their tail.
Dark blue or black back
Lower sides of belly silvery white, colourless elongated oval spots arranged in Horizontally oriented rows
Dorsal fins are blackish
Second dorsal fin has tip washed with yellow
Pectoral and pelvic fins are blackish
Anal fin is silvery, with tip washed with yellow
Anal finlets are yellow with greyish margins
Caudal fin is blackish, with streaks of yellowish-green
Kilojoules : 521 (124 calories)
Cholesterol : 30mg
Sodium : 37g
Total fat (oil) : 0.5 g
Saturated fat : 33% of total fat
Monounsaturated fat : 13% of total fat
Polyunsaturated fat : 54% of total fat
Omega-3, EPA : 14 mg
Omega-3, DHA : 100 mg
Omega-6, AA : 15 mg