Sabyasachi- Exactly, I don't know how bycatch reduction devices (BRDs) could work on these nets. Given the small size of the fish these nets catch, there seems to be no scope of allowing smaller animals to escape, as can be achieved with wider mesh size nets. Given the very structure of the sea snake's body, entanglement would happen very easily.
It is also difficult to study the lives of sea snakes... Otherwise, a proper understanding of their life cycle could possibly help avoid human conflict with them, at least at times of mass aggregations.
I have not had a chance to observe the operation of large shore seines (sometimes several kilometres long). Have been repeatedly watching the smaller ones, but haven't found many sea snakes in them on any of my surveys- the occasional one or two. Of course, they do contain other bycatch. Have seen bottom-dwelling sharks and skates in them for instance.