第(16/17)页x at-sea sightings since 2004 the first video record of this type was made in 2014 between the kerguelen and crozet islands， and again in 2017 off the coast of cape horn， chile it is recognizable by its small white eye patch， narrower and shorter than usual dorsal fin， bulbous head (similar to a pilot whale)， and smaller teeth its geographic range appears to be circumglobal in sub-antarctic waters between latitudes 40°s and 60°s although its diet is not determined， it likely includes fish， as determined by photographs around longline vessels， where type d orcas appeared to be preying on patagonian toothfish (dissostichus eleginoides)
types b and c live close to the ice， and diatoms in these waters may be responsible for the yellowish colouring of both types mitochondrial dna sequences support the theory that these are recently diverged separate species more recently， plete mitochon
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