Hey Manny, thanks for your reply and the link. The trap looks interesting but must be for shallower water with live fish. Bermuda is a little different than the Caribbean, as we have found larger numbers at deeper depths, so far - much more info needed in this regard.
Thanks for your offer to help, I would be happy to post drawings of my ideas for the deep sea artificial lure - if modeling it would be helpful for construction, that would be great - especially if you could create models that could be used by 3D printing for the parts.
BTW my 3rd idea for catching Lion fish with the ROV (constant slurp hose to boat) would be a lot easier to use at shallow depths (where most problems seem to be in the Caribbean) and the hose (slinky-type wire reinforced) would probably only need to be 6" in diameter. The suction mechanism would look something like an oversized manual bilge pump (with stop screen and evacuation from one-way valved T at btm). Sucks in when the ROV arm is positioned in front of a Lion fish (use an artificial fish in front of the nozzle for a lure?) and on the down stroke, the one-way flap at the front end of the hose closes and the water is dumped through a strainer on the boat. With only 20-30 feet of this kind of hose, it should not be too hard to handle and store on a med sized boat. If this sounds interesting, I could also draw out the simple plunger/pump design, if needed.