A Perth man has been fined more than $100,000 for buying black market abalone and selling it for a profit.

40-year-old Kevin Huynh admitted buying hundreds of kilos of abalone and lobster from a man in July and August last year.

He sold the shellfish to Chinese restaurants.

In the Perth Magistrates court today he was fined $5,000 for four counts of contravening the Abalone Management Plan.

The Magistrate was also compelled to fine him another $83,000 based on the weight of the abalone he received.

He was also ordered to forfeit the van he used to transport the abalone.