Jay Cooney and I were having a discussion about this sighting at the Zombie Plesiosaur Society and he indicated the witness drawing at top. I cut out just the black part showing above the surface and said "Looks like the two humped conformation with flippers tilted up on the far side" and Jay's reply was "Yes, I was actually just looking at that myself. Would support the idea of its [the prolonged "body" at the rear] being an illusion of the water with an unknown animal present." and I am pretty sure that was only the wake.
an excerpt describing this sighting posted by Tabitca for the CFZ included this information:
in 1985 two brothers Robert and William Clark were sitting in a car near the sea wall. This is their story of their experiences and there is a link to their site at the end of the blog post where you can see stills of the film they took etc :
I was not convinced the sections of skin as mentioned actually represented scales as opposed to regular creases in the skin, something which has been reported in other cases especially at the joints around the flippers, and here the creases are often said to resemble an elephant's hide. The way the neck moved, the size of the neck, and the way that it curved over and struck at the sea lions, are all consistent with Longnecked Sea Serpent reports otherwise.