Butterfish (Odax Pullus)

Written by: Brendon (Dive Division Manager)

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Time to read 1 min

Butterfish/Greenbone species infographic

There is no better fish to begin our species of the month than the humble Butterfish! Although fairly easy to secure a feed, Butterfish can be elusive and shy, providing a great way to polish your skills relatively close to shore.

Where To Find Them?

Butterfish/Greenbone (Odax Pullus) are a premium fresh fish yet largely overlooked by most divers. Found only along the New Zealand coast, they are not often found at depths greater than 15 meters, making them a perfect species for novice spearos to start hunting. Butterfish hang out in kelp forests and can often be encountered while searching for crays and pāua.

Image of a Butterfish

Maturation & Size

Butterfish start life and mature as females, with brown to green colouring. As they grow older, they turn into males and become dark blue-black. The legal take size is 35cm in most areas, but be sure to double-check on the MPI website to avoid any mistakes.


These beautiful tasting fish range from 30 - 50cm, but bigger specimens up to 70cm have been found further south, in cooler water.

How to Catch 'Em

Butterfish are easily spooked! So, don't dive directly onto them or make big movements. A good tip is to swim into the kelp and hide for a bit until they start poking their heads out. Then, you can calmly select your target and engage, using our smaller Divetech 75cm and 90cm spearguns will get the job done.

Must Have Products For Novice Spearos

How to Cook 'Em

With subtle tasting, white creamy fillets, and bones that are easy to remove, Butterfish are perfect for baking, steaming, or even making a decent beer batter with chips. Being a shallow, coastal species, Butterfish are a great table fish that don’t require too much planning and effort to find and serve up to the family. It's a great fish to practice your technique and keep everyone fed.

Photo of Brendon the Author

The Author: Brendon (Dive Division Manager)

Brendon is a seasoned diver with nearly 35 years of experience and a passion for the ocean. From a PADI instructor to a commercial diver on oil rigs and wrecks across NZ, Australia, and Papua New Guinea, he has seen a lot! Now, he enjoys teaching his children about the underwater world. A staunch advocate for ocean conservation, Brendon views Divetech as a means to help others explore and appreciate the importance of protecting our oceans.