Tuna is fished in the Indian Ocean by either purse seine or longlines ships. In 1995 the catch unloaded by purse seiners was 7367 tonnes and 14,772 tonnes were
transhipped in Mauritius by longliners.
The main fishing ground for purse seiners is the western part of the Indian Ocean form 49 E to 71 E and 9 N to 7 S.
The species composition indicates that around two-thirds of the catch is made up of Skipjacks, 20% by Yellowfins, 10% by Bigeyes and the remainder by other species.
76% of the catch by longliners transhipped in Mauritius is made up of Albacore ( Thunnus alalunga ).
Longliners come from Taiwan mainly with some from Japan and South Korea. In 1995 there was only one longliner from Mauritius.
The raising of fish and other marine organisms in coastal waters is carried out in barachois which are coastal areas enclosed by stone walls. In 1995, 24 barachois
were operative which produced 44 tonnes of fish. Marine shrimp culture is also carried out and yielded close to 3 tonnes in 1995.