# Dorsal The tail is a key piece of a koin, and they come in many different forms. Its upper fin, in addition, always matches its tail. We call the set of both elements the dorsal.

**Bonnet** This type of dorsal is the most common among the koins, providing just enough technique to let them show off at races.

**Brush** With this common set of larger fins and tail, koins with these features are ready to paint their rivals' defeat.

**Beak** Similar in appearance to that of a mighty bird, this tail appears to start and end at the same time. Makes for a fantastic set with its upper fin.

**Bow** A rather uncommon sight, this elegant dorsal is simple, yet makes a statement.

**Blade** Don't swim near this rare tail, or you might wind up cutting yourself on its sharp appearance. Also, watch out for its upper fin!

**Bait** With this rare dorsal, the lure becomes the lurer! So small, yet so powerful.

**Bellows** This rather rare back is a spectacle anywhere it goes, leaving in its wake, a trail of admiration.

**Blackfly** While it’s completely harmless, this particularly rare stinger of a fin makes opponents think twice before trying to pass.

**Basil** Only a small batch of koins come with this particular back, which seems to leave a sweet scent on any track it’s displayed.

**Bight** Commanding glances anywhere it goes, this set brings up an immediate urge to surf whenever it’s seen. Cowabunga!