Here's a link to the Texas site.

http://www.tpwd.state.tx.us/publications/pwdpubs/media/pwd_bk_w7000_1011.pdf

Looks like almost anything with a hook on it and attached to a line. Firearms are only allowed on private property. Real similar to Florida as they had the same firearm regulation as well. I used a rifle down there to get a pretty good one but it was on private land and I shot it in a irrigation canal. In biggger water I can see where they could be lost easily without a line attached as they sink pretty fast.