棘 - thorn, splinter, spine

spiny ray (of a fin)

black-headed monitor (Varanus tristis); freckled monitor

Echinodermata (phylum of marine invertebrates)

echinoderm

briars; thicket; the bush

barbed wire

bone spur; osteophyte

Ryukyu spiny rat (Tokudaia osimensis)

Muennink's spiny rat (Tokudaia muenninki); Okinawa spinous country-rat

poisonous spine; venomous spine

flat rock crab (Percnon planissimum)

helmet crab (Telmessus acutidens)