After I accidentally found that 1:87 shark and installed it (him?) on the layout, I just *had* to build the boat that did the job: "Orca", from the movie "Jaws".
There is no kit available, so I kitbashed the resin hull down from a larger HO gauge trawler by sectioning it lengthwise to get the correct (?) beam width and then trimming circa 20 HO feet off of the stern. The rest is mostly scratchbuilt; with liberal doses of small boat parts and dockside details that I had in my parts box.
I worked mostly from downloaded photos of the boat from the movie (Google images is your friend); discovering in the process that lots of the "shipboard" scenes were actually shot on sets, so it took some finageling to make both the size and the proportions fit what we saw in the movie.
She's just short of 48' at the waterline, and so far everyone who's ever seen the movie has instantly been able to identify her on first sight, so i'm reasonably happy with the way she came out.
~Pete