Step 1: Start by drawing a triangular fin. Make the right side very wide and wiggly. Draw a line in the middle.
Step 2: Draw the mantle behind the fins. Draw a rectangular shape on the right of the fin.
Step 3: Now we draw the head by drawing two curved lines on either side of the mantle. Draw a line at the base.
Step 4: Next we draw the eye at the bottom of the head. Draw an oval shape and then a tiny hollow circle in the middle of it.
Step 5: Now we draw the tentacles by drawing several apendages arising from the top of the head. Make them all pointed at the end and curved in different directions. Draw a line of tiny circles on one side of all tentacles for detail.
How to Draw a Realistic Squid – Step-by-Step Tutorial