D4J,
As a new bug hunter myself, (Second season) One of the best tips given to me was "Don't wait to grab the bug". I often found myself trying to figure out the best way to loop, snare, tickle, or coax the lobster out only to have my buddy just reach down and grab it and put it in the bag.
Dive with gloves, I use 2 pair, one pair I always wear and a second rubberized pair over them. (be careful not to get too big of a glove, they should fit snug but not to tight)
Inevitably you will grab at the antanae or feelers....just happens that way.... be carefull and try not to do this because all you will do is break them off and the bug will get away sans antanae
Be prepared to catch the bug if he decides to turn and swim out of the hole he is in.
Check for eggs first..... no use measuring a captured bug that you can't keep anyways. Maybe the first one you could measure for practice, but it causes unneeded stress to the lobster if you can't or don't intend to keep it.
Above all CHECK YOUR GUAGES !!! do this more often than you would normally. You will be working and probably excited to boot. You will use your gas faster than you think.
also, consider what your after and what you're willing to do for it. Sebastian doesn't have the coral reef system that say West Palm has, but don't feel the need to get that bug so much that you would give up on any good traits of not trashing coral or other marine life to get it.
Hope this helps, and good luck !!!
-Crispy