Sea unicorns are a rare species of seahorse with a large horn on their foreheads. They first appear in the episode "Bossy Boots." Whenever they appear, they are usually seen with rainbows, flowers, and other kind-hearted imagery.
Sea unicorns are white seahorses with periwinkle fins, tails, and a golden horn.
Role in series
A sea unicorn appears on a $20 wall hanger in Mr. Krabs' office. However, it resembles a regular seahorse more than a sea unicorn.
They are seen in the background on the ball toss game.
A sea unicorn is seen roaming the Bikini Goodlands.