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A couple of dusky dolphins (Lagenorhynchus obscurus) leap out of the water off the coast of Kaikoura, a coastal town in New Zealand’s Canterbury region. Dusky dolphins are about 1.9m long (6.5ft) and sport a dark diagonal band across their sides and a bluish tail. They also lack a beak at the end of their snouts. Apart from New Zealand, dusky dolphins can also be seen frolicking and swimming at great speeds in the coastal waters of Southern Australia, Tasmania, and southwestern South Africa. Though it’s difficult to estimate how large the population of dusky dolphins is, the evidence points to massive casualties caused by commercial fishing with nets or illegal harpoon fishing.