A blue-spotted sea urchin (Astropyga radiata), Hawaii, United States of America, Pacific, North America

Pair of Coleman Shrimp on Fire Sea Urchin, Periclimenes colemani, Ambon, Moluccas, Indonesia

Detail of Fire Urchin, Asthenosoma varium, Ambon, Moluccas, Indonesia

Pair of Coleman Shrimp on Fire Sea Urchin, Periclimenes colemani, Ambon, Moluccas, Indonesia

Pair of Coleman Shrimp on Fire Sea Urchin, Periclimenes colemani, Ambon, Moluccas, Indonesia

Commensal shrimps (Periclimenes colemani) on fire sea urchin, Alam Batu, Bali, Indonesia, Southeast Asia, Asia

Fire urchin (Asthenosoma varium), Sinandigan wall, Puerto Galera, Mindoro, Philippines, Southeast Asia, Asia

Fire Urchin (Asthenosoma varium). Indo Pacific

Coleman Shrimp (Periclimenes Colemani) Zebra or Urchin Crab (Zebrida adamssi) on Fire Urchin (Asthenosoma varium). Lembeh Strait, Sulawesi, Indonesia

Fire Urchin (Asthenosoma varium). Indo Pacific

Fire Urchin (Asthenosoma varium). Indo Pacific

Coleman shrimp on fire urchin (Periclimenes colemani). Indo Pacific

Brook's urchin shrimp, Allopontonia brookia, in a fire urchin, Asthenosoma ijimai, Komodo National Park, Nusa Tenggara, Indonesia, Pacific Ocean

Fire urchin, Asthenosoma varium, Sinandigan wall, Puerto Galera, Mindoro, Philippines.

Zebra crab in fire urchin, Zebrida adamsii and Asthenosoma ijimai, Komodo National Park, Nusa Tenggara, Indonesia, Pacific Ocean

Indonesia, Komodo Island, Two coleman shrimp (periclimenes colemani) on bright pink urchin.