At the risk of being biologically inaccurate, today I piped a hot pink octopus. This little critter would be perfect on top of an ocean-themed cupcake. All you need to pipe octopi are round tips #10, #4 and #2, royal icing in white for the eyes and hot pink (or whatever color you like) for the body and legs, a dusting pouch filled with a 50/50 blend of cornstarch and powdered sugar, a flower nail, parchment squares, a Styrofoam block to rest the nail in, a glue stick, and a black Gourmet Writer by AmeriColor.
When the eyes are dry, add "pupils" to them with the Gourmet Writer. When the octopus is completely dry, peel away the parchment paper, and set him (her?) to swim on an ocean of blue icing. I'll try to pipe more aquatic friends for the octopus soon!