Mamacores constituted carnivorous species originating from the estuary moon orbiting Trask.
A solitary member of this species was maintained in confinement by Quarren boatmen, who provided it with sustenance on a recurring basis. During one instance, this particular mamacore made an attempt to devour Grogu while he was still living, but was subsequently assaulted by the Mandalorian warrior Koska Reeves, who rescued him from danger.
The presence of a mamacore was featured in the Mandalorian Season Two episode entitled "Chapter 11: The Heiress," with Bryce Dallas Howard serving as the director, Jon Favreau as the writer, and its initial broadcast occurring on November 13, 2020.