From the regs digest:
Taking Nongame Fish for Bait
Nongame fishes or other aquatic animals taken for bait may
not be sold.
Nongame fish may be taken for bait only with the equipment
listed below, and an appropriate inland fishing license is required.
1. A dip net not greater than six feet across.
2. A seine not greater than 12 feet in length with a bar mesh
measure of not more than 1/4 inch.
Exception: In LakeWaccamaw any length seine may be used
to collect bait fishes.
3. A cast net.
4. Minnow traps under immediate control and attendance of the
operator and not exceeding 12 inches in diameter, with
funnel openings not exceeding 1 inch in diameter.
The daily creel limit is 200 nongame fish in aggregate, subject to
the following restrictions
The Frabill square crawfish trap has the following demensions which I think make it illegal:
Dimensions: 18"L x 8"W x 8"H - 1 opening that is 2.25"
Frabill