Page 109 - Design in Nature

The muscular system in the cuttlefish closely resembles that of the octopus.
However, there is an important difference: the cuttlefish has a layer of
tendons, called the tunic, instead of the longitudinal muscles of an octopus.
The tunic is composed of two layers that cover the inside and outside of the
body just like the longitudinal muscles. In between these layers are the
circular muscles. The radial muscles are situated in between these, in a
perpendicular orientation.

The eye structure of a cuttlefish
is extremely complex. It can
focus the pupil by bringing the
lens nearer to the retina. It can
also adjust the volume of light
taken into the eye by closing or
opening the little lids beside the
eye. The presence of such highly
complex organs in structures of
two completely distinct species
such as humans and cuttlefish
cannot possibly be explained by
evolution. Darwin also spoke
about this impossibility in his
38
book.