In some areas a lot of nets and other fishing tackle ends up snagging on shipwrecks. This "ghost fishing" gear still ends up killing a lot of marine life. The Ghost Diving Foundation has been cleaning that up but it's a slow and expensive process.

https://www.ghostdiving.org/

I never saw anyone fishing with nets at least in the area of the gulf coast I was at (around the Florida pan handle).

Its all deep sea fishing around there, you drop a line near the artificial reefs looking for bottom feeders.