Young Hercules (1998)

S1E43 The Beasts Beneath

Hercules, Iolaus, Lilith, Theseus, and their fellow cadet Marco find themselves ensnared in the vast and treacherous Dune Sea, a place shunned by many. This forbidden expanse is notorious for its lurking sand sharks, which prey on anyone daring enough to venture into their territory. Among the five cadets who ventured in, only four will make it out alive.