It may be mentioned that in this species, as in some others, the last
spinous ray in the dorsal is entirely invested by the membrane, and does
not attain to the margin, so that in counting, it may be very easily
overlooked.
In Mr. Darwin’s notes, it is stated that this species bites very
severely, having driven its teeth through the finger of one of the
officers in the ship’s company. Its two very long sharp canine teeth at
the back of the lower jaw are well calculated to inflict such a wound.