Fiordland is a high point of any visit to New Zealand. Cruise ships will generally visit Milford Sound
For the Official Visitor Guide, Click Through Here
Expect mainly Bottlenose Dolphins, there is a pod of about 60 in Milford Sound, and maybe a couple of Dusky Dolphins (named for their colour, not he neighbouring Dusky Sound) in Milford Sound. The dusky dolphins are typically the smaller of the two.
Below the surface, and interesting population of ‘black’ corals:
during the mating season (July to November), Fiordland Crested Penguins can be spotted:
and, year ‘round, lollygagging Southern Fur Seals: