Two men found with more than 100 undersized blue manna crabs in Dawesville have been fined more than $11,000 combined.
Forrestfield men Eligio Cacapit De Leon, 54, and Michael Garcia Lorenzo, 40, both entered an endorsed plea of guilty to the charges of possessing protected fish.
Department of Fisheries prosecutor Darren Harbord told the Mandurah Magistrates Court last Tuesday the men were found with the undersized crabs at 9.35pm on January 25 at Warrungup Spring Reserve in Dawesville.
Mr Harbord said 116 of the 131 blue manna crabs the pair had caught were undersized, ranging between 95mm and 126mm.
The minimum legal size limit for blue manna crabs is 127mm across the widest part of the shell.
Leon and Lorenzo were each fined a mandatory $5000 penalty, $500 fine and $225.90 in costs.
Aveley man Aaron Geoffrey Kollmorgen, 36, entered an endorsed plea of guilty after catching 22 undersized blue manna crabs.
Mr Harbord said Kollmorgen was catching crabs in a scoop net about 2pm on February 17 in Coodanup.
The undersized crabs ranged in size from 88mm to 124.9mm.
Kollmorgen was fined a mandatory $1100 penalty, $500 fine and $205.30 costs.
Waikiki man Ian David Russell-Brown, 67, was convicted in his absence to catching 22 undersized blue manna crabs.
Mr Harbord said Russell-Brown was found in a dinghy near a Falcon boat ramp with crabs ranging from 112mm to 126mm in size.
Russell-Brown was fined a mandatory $1100, $650 fine and $225.90 costs.