Steel Eel, Steel roller coaster at SeaWorld San Antonio, Texas.

Steel Eel is a steel roller coaster at SeaWorld San Antonio in Texas, designed with a layout that combines steep descents and sharp turns throughout the ride. The track structure creates rapid changes in direction and elevation that keep riders engaged from start to finish.

SeaWorld San Antonio announced Steel Eel on August 18, 1998, after the positive guest response to The Great White (1997). Built by D. H. Morgan Manufacturing with Browning Construction as general contractor, it opened with the park on March 6, 1999, as the park's most expensive single-season investment in a decade.

The name Steel Eel refers to the coaster's long, twisting steel track rather than to any marine decoration. The trains seat 36 riders in six cars, three rows of two, each with a lap bar. Originally yellow track on dark teal supports, it was repainted in 2019 with bright violet supports and a brighter yellow track.

Riders must be at least 1.22 metres tall. The coaster runs two trains of six cars, each car seating six people in three rows of two, with a lap bar per seat. It sits in the southeast part of the park near The Great White and three children's attractions, so it can be paired with those in one walk.

During the ride, passengers experience several moments of weightlessness as the coaster goes over hills and drops. These floating sensations occur because of how the track is shaped and add an extra thrill to each ride.