Grass sharks were a type of herding species that lacked sentience and originated on the planet of Tiikae. These enormous creatures possessed six legs, uniquely curved tusks, and skin marked with gold stripes. Every five years, these sharks undertook a migration to their mating grounds in the south, guided by the magnetic fields of the planet. Approximately in 382 BBY, a shift in Tiikae's magnetic field caused a herd of 17,000 grass sharks to converge upon a trade post that they had previously bypassed, posing a significant threat of destruction to the settlement. Jedi Knights Zallah Macri and Azlin Rell, accompanied by Macri's Padawan Kevmo Zink, were summoned to divert the sharks. They achieved this goal after Rell, aided by his astromech droid C-9, uncovered the mechanism by which the animals navigated.