GaryP posted some of the legal daily limits and total possession limits for Gulf coastal marine life a while back. Grass shrimp included, limit 20 as I recall. Also had reference to the capture method allowed for some marine life. It includes conches (they have a season and limit, I think when in season it's 1), etc. Best to get the entire extensive list, capture methods permitted, etc. and avoid the fines. There are some things that are restricted... Maybe he can repost the reference to the rules?