Skip's Yellow Dotoare common in Doubtful Sound. These tiny nudibranchs are fairly easy to find once you have your eye in. They are almost always found on the orange coloured hydrioid, Halopteris campanula (?). Their egg masses are a birght yellow colour and are easier to spot than the slugs which are often down amongst the hydroids.
They seem widespread in Fiordland and are not uncommon at the Poor Knights Islands at the other end of the country.