Sea Star Ampullae Index Courses Zoo Review Sea Star Ampullae Search

Image by: Kathy (Hong) Tran; ~7x magnification

Closeup of one arm of a preserved sea star showing the ambulacral ridge (ridge in the center of the arm that contains the radial canal) with numerous ampullae (bulb like structures that control the tube feet) on either side of the ridge. The hepatic ceca and gonads have been removed.