Phil said:Could the unknown 'White octopus' be a Benthoctopus does anyone think? (try comparing a Google image search or this footage)
Steve O'Shea said:It's probably Vulcanoctopus (a vent-dwelling taxon) - although the genus is rather poorly known (similar in many respects to 'Benthoctopus').
Actually, the genus Benthoctopus is probably little more than a synonym of Bathypolypus (as the type species of Benthoctopus was actually a Bathypolypus); differentiating the two in accordance with more recent diagnoses, presence or absence of a crop diverticulum, and presence or absence of lateral cusps on the rachidian tooth of the radula, doesn't work for all species. I have yet to see a redescription of 'Benthoctopus piscatorum' (the type species of Benthoctopus), so I am wary of uncritically accepting this synonymy until I do. Nevertheless, and in no way am I criticising Ian Gleadall's work at all, Ian has described a new genus to accomodate at least one of the species typically referred to Benthoctopus - Muusoctopus, and we may well find that a number of other species will eventually be attributed to this genus (Gleadall 2004). There's another genus out there, Atlantoctopus, that really hasn't received the systematic treatment warranted before any new genera were proposed.
Gleadall, I.G. 2004. Some old and new genera of octopus. Interdisciplinary Information Series 10(2): 99-112.