A Mandurah man has been fined just over $11,000 for pulling his wife's lobster pot and interfering with 14 others off the coast of WA last year.

Richard Collard and friend Daylan Nathan, both 36, were out on the water near Blue Bay at Halls Head on November 7 last year when Fisheries officers observed them pulling, setting or interfering with nine lobster pots.

WA fishing laws are strict when it comes to pot ownership. Credit:Drew Grosas

It is understood one of the pots Mr Collard pulled was registered to his wife, and not him.

Just a day later Fisheries officers also observed Mr Collard out on his boat with another man, Daniel Potter, 32.