Try a couple of searches on this topic, it's been discussed before. Be creative on the searches, I don't remember the thread titles but it's come up at least twice this past year.
I've been able to catch a perc 10X plus with my hand to get it out of an overflow that she had a habit of getting into (but a wrasse would probablly be way too quick to catch this way).
One way is to pull out the duroso and let it "flush into the sump", but if you do this you risk impaling the fish on a feather duster tube or something. If you want to try this method hold a mesh filter bag over the overflow so the fish goes right there instead of having to catch it in the sump.
You can also carefully pull the duroso but hold it right over the bulkhead so the overflow drains slowly (either way shut the main pump off first) then pick the fish up with your hand or a net once it's stuck in .5 inches of water
(this can't be good for a fish but I've done it and not killed the fish along with my many bare handed clown rescues, yes I still have that clown, she's about 4 yrs old).
so search for those old threads, other people had better ideas than mine.
jk