Georgette Douwma / Hydroid or Fairy crab (Hyastenus bispinosus) perched on soft coral. It has decorated its body with hydroid polyps. Majidae - Spider or Decorator crab. Rinca, Komodo National Park, Indonesia.

Juergen Freund / Sponge decorator crab (Hyastenus elatus) almost invisible under the sponges attached to its shell. Lembeh Strait, North Sulawesi, Indonesia.

Georgette Douwma / Hydroid or Fairy Crab (Hyastenus bispinosus) on crinoid or featherstar. Hydroid polyps are growing on its carapace. Rinca, Indonesia, October.

Georgette Douwma / Hydroid or Fairy crab (Hyastenus bispinosus) on Sea squirt where it has climbed to feed. It has decorated its body with hydroid polyps. Majidae - Spider or Decorator crab. Rinca, Indonesia

Georgette Douwma / Hydroid or Fairy crab (Hyastenus bispinosus) on Sea pen (Pteroides sp.) where it has climbed to feed on plankton floating past. It has decorated its body with hydroid polyps. Majidae - Spider or Decor...

Georgette Douwma / Hydroid / Fairy crab (Hyastenus bispinosus) on Sea squirt where it has climbed to feed, it has decorated its body with hydroid polyps, Rinca, Indonesia

Georgette Douwma / Hydroid / Fairy crab (Hyastenus bispinosus) on Sea pen (Pteroides sp) where it has climbed to feed on plankton floating past, it has decorated its body with hydroid polyps, Rinca, Indonesia

Georgette Douwma / Hydroid or Fairy crab (Hyastenus bispinosus) that has decorated its body with hydroid polyps, Rinca, Indonesia

Chris Newbert / Crab (Huenia sp) carrying Algae (Halimeda macroloba) for camouflage, 70 feet deep, Papua New Guinea

Flip Nicklin / Kelp Crab (Pugettia producta) on Kelp (Macrocystis pyrifera) underwater, Clayoquot Sound, Vancouver Island, British Columbia, Canada

Flip Nicklin / Kelp Crab (Pugettia producta) on Kelp (Macrocystis pyrifera) underwater, Clayoquot Sound, Vancouver Island, British Columbia, Canada

Flip Nicklin / Kelp Crab (Pugettia producta) on Kelp (Macrocystis pyrifera) underwater, Clayoquot Sound, Vancouver Island, British Columbia, Canada