Keke Palmer Ramona (voice) Michael Cera Armen (voice) Bobby Cannavale Bobby (voice) John Magaro Manny (voice) Jon Rudnitsky Jimmy (voice) Steven Van Zandt Bruno (voice) Vanessa Bell Calloway Val (voice) Shoshannah Stern Shelly (voice) Ron Funches Anemone (voice) Mario Cantone Mr. Cacciatore (voice) Russell Brand Mako (voice) Gideon Adlon Denise (voice) Liza Tarbuck Camille (voice) Lesli Margherita Etta / Bedazzled Lady (voice) Cassandra Scerbo Loretta / Sea Crab Mom / Female Land Crab (voice) Phil LaMarr Big Sal / Little Junior / Donny / Additional Voices (voice) Steve Schirripa Mr. Marinara (voice) Sharon Angela Mrs. Marinara (voice) Jimmy Donaldson Hot Sauce Crab (voice) Joseph Balderrama Chauncey (voice) Sean Chiplock Nigel (voice) David Soren Yoga Crab / Battle Dad (voice) Valarie Rae Miller Townie Crab / Neon Crab / Female Sea Crab (voice) Jim Cummings Curly / Local Land Crab (voice) Maureen Van Zandt Shop Mother (voice) David Ian Salter Unicorn Crab (voice)