Thermidorian

The Thermidorians are a crustacean species that appear in TMNT Fast Forward.

Physiology
The Thermidorians are a bidpedal race of crustaceans that resemble lobsters. They possess a pair of prehensile claws that enable them to grip object and manipulate tools.

Culture
Not much is said about their culture, save that some Thermidorians operate as mobsters.

Source

 * TMNT Fast Forward: S06E26: Zixxth Sense