   By Evan Ackerman   USB Squid   Both squid and cuttlefish are
cephalopods, which are a class of salt water mollusks with
tentacles. Cephalopods also include octopuses and the nautilus,
which is the only type of cephalopod with a shell. Moving right
along, the most notable difference between cuttlefish and squid
is that cuttlefish has a bone (called, you guessed it, the
cuttlebone) which is used to control buoyancy (squid maintain
neutral buoyancy chemically, with ammonium). So let’s examine
our USB drive. Umm, it’s got a USB connector in there, but I
don’t think that counts. Next!  Since actual cephalopods don’t
have flash memory, let’s concentrate on the exterior. Squids and
cuttlefish are anatomically similar, with eight arms and two
longer tentacles, a beak, and skin that changes color (check out
this video of octopus camo). The most easily identifiable
differences are probably in the mantle (the body piece) and in
the eyes. Cuttlefish have a fin that wraps all the way around
their mantle, while squid ha