http://www.fws.gov/southeast/pubs/SWLAcomplex_Fish.pdf
Cast netting
Each person is required to have valid basic and saltwater
licenses to cast net for shrimp. Cast nets must be less
than 8.5 feet in radius. Recreational cast netting for
shrimp is only permitted during the Louisiana inshore
water shrimp season. See refuge specific regulations for
additional information.
The daily shrimp limit during the
Louisiana inshore shrimp season is five gallons of headson
shrimp per day, per vehicle or boat. The daily bait
shrimp limit is one gallon per day per boat, outside the
Louisiana inshore shrimp season and before noon during
the inshore shrimp season on Sabine.