Print the page.  Clean a milk jug.  Cut the flat pieces off it.  Have the kids trace a pattern onto the piece of the jug.  Cut out.  Take a nail and etch (carve) into the jug making lines and ridges.
Then have the kids take a crayon with the wrapper removed and rub along the creature.
Piece of the crayon will be left in the ridges coloring the creature.
Expand the activity by having kids create their own sea creature.

Pattern