New Zealand first seals were hunted to the brink of extinction in the early 19th century (it seems most of the early settlers came to NZ to kill whales or seals). Now they litter the rocks in places like Ohau point near Kaikoura. There were lots of pups and when we stopped there in January. This is great to see as the colony was badly disrupted during the 2016 earthquake and subsequent rockfalls when more than 40 seals were killed. It took a year for the coast road to be repaired (during which seals had to be moved) .
You can also go swimming with seals in Kaikoura. I did this when I was a backpacker in 1996 and it was one of the best experiences of the two months I spent in New Zealand. The seals are very playful, like underwater dogs. It is amazing to get so close to them. This is something that is not recommended when they are on the shore, where they become very territorial.
More information on fur seals here.