Same as a group of fish, it is a school of sharks.
No because they do not hunt as a group, delphins do hunt as a goup because they are smart.
a herd
colony
A flotilla.
A system
YesSpotted dolphins do have enemies : Killer whales and big sharks such as the Blue, Greenland, Riff, Hammerhead, The great white, and the mako sharks.
everclear
A school of fish.
It gets the independent variable.
A tableau.
Sony made the ps2
If you mean "group", it is a covey.