More links and websites
New Zealander Howard Barraclough Fell (1917–1994) was a world authority on echinoderms, publishing extensively and teaching at universities in New Zealand and the United States. An obituary and list of his publications are on the website of the Equinox project.
A comprehensive site run by a conservation group, with many images of New Zealand starfish, sea cucumbers and sea urchins, as well as other marine animals.
More suggestions and sources
Batson, Peter. Deep New Zealand: blue water, black abyss. Christchurch: Canterbury University Press, 2003.
Morton, John. Seashore ecology of New Zealand and the Pacific. Auckland: David Bateman, 2004.