Steel Eel is a custom roller coaster built by D. H. Morgan Manufacturing. At a height of 150 feet, Steel Eel is the tallest roller coaster at SeaWorld San Antonio and was the second coaster built by SeaWorld, following The Great White (1997), after new management felt the park needed to offer more thrilling rides. Steel Eel had to be custom built to fit along the slim area beside the lake and utilizes a simple lap bar and seatbelt restraint system. Key elements of Steel Eel include two hills after the lift hill with a small valley between the two and a diving dogleg turn and triple humpback hills after its mid-course brake run.
With a paint scheme consisting of bright yellow track and violet supports, it has become a permanent staple in the park's skyline.