Here is my all-time favorite:
There are some fundamental differences to the original gotcha:
The head is a Flouro hot red/orange bead.
The wing is Butterscotch color Arctic Fox.
This fly in sizes 8 - 4 has caught consistently in the Bahamas and also Christmas Island.
This next one is in Dick Brown book (Phlueger Hoy). I've included it since it was tied by Bob Hyde of Peace & Plenty in Exuma. The blue color imitates a color feature on a small crab. The marabou wing is Tan & the palmered hackle a dirty white saddle. This is a great fly for very spooky tailing fish since it litterally lands like a feather