Never let biology get in the way of your laws:
http://www.news.com.au/story/0,10117,19533078-29277,00.html
WHAT is a fish? Federal Parliament was to tackle the tricky issue.
The Agriculture, Fisheries and Forestry Legislation Amendment (Export Control and Quarantine) Bill 2006 was to define a fish as "an aquatic vertebrate or an aquatic invertebrate but not a mammal or a bird".
In other words, prawns and barramundi yes, whales and dolphins no.