Fish and Game Code § 8595

(a) Prawns or shrimp may be taken for commercial purposes with a trawl net, subject to Article 10 (commencing with Section 8830) of Chapter 3, or in either a prawn trap or a shrimp trap, subject to Article 1 (commencing with Section 9000) of Chapter 4.

(b) No other species shall be taken in a prawn trap or a shrimp trap. Any other species taken incidentally with a prawn trap or a shrimp trap shall be immediately released.