Island of the Fishmen arrives on Blu-ray as a limited 2,000-copy release from Delirium Home Video, with Sergio Martino’s 1979 adventure running 99 minutes. The disc presents a 1080p transfer with English DTS-HD Master Audio 5.1 and Dolby Digital 2.0 options, plus English SDH subtitles. A tropical-island creature feature, it follows a military doctor and…