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
Delphinus bounds of the constellation since 1992. HR Delphini was a nova that brightened to magnitude 3.5 in December 1967. A nova was discovered by amateur astronomer Koichi Itagaki, Nova Delphini 2013. Giants within our galaxy in Delphinus aside from Delta, Gamma and Epsilon include: Its rich Milky Way star field means many modestly deep-sky objects. NGC 6891 is a planetary nebula of magnitude 10.5; another is NGC 6905 or the Blue Flash nebula. NGC 6934 is a globular cluster of magnitude 9.75. At a distance of about 185,000 light-years, the globular cluster NGC 7006 is at the outer reaches of