Leyend: Both lobsters and crabs are within the subphylum Crustacea of the phylum Arthropoda. California spiny lobsters (Panulirus interruptus) lack the large pinching claws of their Maine lobster relatives. California spiny lobsters are nocturnal, and emerge from rocky crevices at night to scavenge on sea urchins, small clams, mussels and worms. If startled, lobsters will kick their large abdominal tails rapidly to swim away (backwards!) to safety. By day, only the tips of their spiny antennae are visible from the rocky reef crevices.