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http://www.dfg.ca.gov/news/Question: What are the rules and regulations on the mantis shrimp? I accidentally snagged one with a hook and line and let it go because I knew nothing about it. I didn't even know what it was until I got home and was able to research it.
Answer: There are no specific regulations for these crustaceans, but they are protected by the general sport fishing regulations for all invertebrates and crustaceans (CCR Title 14, sections 29.05 and 29.80, respectively). Invertebrates may not be taken by hook and line. Mantis shrimp can be taken in all ocean waters open to sport fishing, and everyone 16 years of age and older is required to have a fishing license. These feisty shrimp can only be taken by hand, and there is a bag limit of 35.