Southern bluefin tuna 1 km in length to catch sardines. Bycatch mortalities of the fishery include the common dolphin ("Delphinus delphis") which is a protected species under state and federal legislation. The species is protected federally under the Environment Protection Biodiversity & Conservation Act. Tuna cages attract sharks, which are drawn to fish which sometimes die in the pens and settle in the bottoms of the floating nets. Inquisitive sharks may bite holes in nets and enter the cages or become entangled in the nets and subsequently become distressed or drown. In response, employees of tuna ranching operations will either enter the water
USS Delphinus (AF-24) USS Delphinus (AF-24) USS Delphinus (AF-24) was built in 1915 as by Workman Clark and Co., Ltd., Belfast, Northern Ireland; acquired by the U.S. Navy 11 August 1942; and commissioned the same day as "San Mateo", Lieutenant O. M. Mikkelsen, USNR, in command. She was assigned the name "Delphinus" on 22 August 1942. Departing San Francisco, California, 12 September 1942, "Delphinus" arrived at Auckland, New Zealand, 4 October. She operated from this base until the end of 1945, carrying chilled and frozen provisions to forward bases in the South Pacific and to the Society, Fiji, and Samoan Islands. After calling