California Code, Fish and Game Code - FGC § 8598.2

(a) Marine organisms identified in subdivision (a) of Section 8597 shall not be taken except by the following methods:

(b) Chemical anesthetics, poisons, or irritants shall not be used or possessed by any person taking or possessing fish, plants, or other marine organisms for the marine aquaria industry.  For the purposes of this section, chemicals commonly used aboard vessels for insect and rodent control may be possessed if no means of delivering those chemicals, including, but not limited to, squirt bottles, used to target those marine organisms is possessed.

(c) Appliances shall be used so that rocks or other mineral matter, aquatic plants, fish, or other aquatic life not listed in subdivision (b) of Section 8597 are not removed from the bottom or otherwise disturbed.