Alex Mustard / California sea lion (Zalophus californianus) uses a Panamic cushion star (Pentaceraster cumingi) as a toy. The sealions pick up the starfish and then drop them and chase after them as they sink. Los I...

Alex Mustard / California sea lion (Zalophus californianus) using a Panamic cushion star (Pentaceraster cumingi) as a toy. The sealions pick up the starfish and then drop them and chase after them as they sink. Los...

Franco Banfi / Scuba diver with Panamic cushion seastars (Pentaceraster cumingi) Sea of Cortez, Baja California, Mexico, East Pacific Ocean.

Franco Banfi / Panamic cushion seastars (Pentaceraster cumingi) Sea of Cortez, Baja California, Mexico, East Pacific Ocean.

David Fleetham / Close up view of five parasitic snails (Eulimidae) attached to the underside of a Knobby seastar (Pentaceraster cumingi), Hawaii, Pacific Ocean.

Tui De Roy / Panamic cushion seastar (Pentaceraster cumingi) with Gulfweed (Sargassaceae) on sea floor. Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Panamic cushion seastar (Pentaceraster cumingi) next to red seaweed. Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Green turtle (Chelonia mydas) sleeping on underwater ledge with Panamic cushion seastar (Pentaceraster cumingi) and Galapagos black coral (Antipathes galapagensis). Galapagos Islands, Ecuador. Paci...

David Fleetham / Close up of skin on Knobby seastar (Pentaceraster cumingi), Hawaii, Pacific Ocean. Usually found below 30 metres.

Franco Banfi / Starfish shrimp (Zenopontonia soror) on a Panamic cushion sea star (Pentaceraster cumingi) close up, Espiritu Santo Island, Baja California, Mexico, Sea of Cortez.

Franco Banfi / Starfish shrimp (Zenopontonia soror) on a Panamic cushion sea star (Pentaceraster cumingi) close up, Espiritu Santo Island, Baja California, Mexico, Sea of Cortez.

Franco Banfi / Starfish shrimp (Zenopontonia soror) on a Panamic cushion sea star (Pentaceraster cumingi) close up, Espiritu Santo Island, Baja California, Mexico, Sea of Cortez.