Fantail Goldfish.

Nearly there:

A beginning on the color.
Trying to capture the pale golden sheen of the head.

Thinking from the inside out.  Adding more white conté chalk
where the color will need to be palest.

Applying the pencil color on top of 'fixed' chalk and
deepening the shadow to generate the illusion
of three dimensions.

Mostly just the filmy part of the top fin and tail to go.