South coast of Cornwall. Water about 25\' deep.
|About half mile from shore we saw a sun fish. It's dorsal fin was slapping on top of the water and then rising up again. It was there for several minutes and when we tried to approach too close it sounded. After we moved away it returned to the surface. The dorsal fin was perhaps 18\" to 2\' long, but we didn\'t see enough of the rest of the fish to estimate its size. We checked with the marine museum curator at Mevagissey harbour who confirmed the species. The local diving club suggested we should register the sighting, so here it is!||Mola mola|