No, "shrimping" does not refer to large scale operations - it refers to "A person taking or attempting to take shrimp...".

Nowhere does it DEFINE the actual species of shrimp. A shrimp is a shrimp. Your link provides just a list of docs. Here's the Recreational Shrimp Regulations:

http://www.tpwd.state.tx.us/publicat...ish/shrimpreg/

As noted above, if you take them on the beach side of the jetty, you should be OK.