Now this is rather sensational! It is a cranchiid squid (Family Cranchiidae), related to the colossal squid. The genus is most likely Taonius (these are all preliminary identifications, until we've had an opportunity to look at the animals in greater detail), but the species ...... ? Note, the outer row of hooks on the tentacle club with a single cusp, but those of the inner row have two cusps (the resolution on the pic isn't that grand). Taonius 3 is of spermatophores implanted into the mantle wall. This is probably what Mesonychoteuthis does also ... although we've not seen the mature Mrs colossal yet.