A thorny seahorse clings to an algae stock, Anilao, Philippines.

actinopterygii anilao animal animal head animal themes animals in the wild close up color image extreme close up fish headshot hippocampus hippocampus histrix horizontal macro muck diving no people ocean one animal osteichthyes outdoors philippines photography portrait sea life seahorse side view snout southeast asia spiny seahorse syngnathidae syngnathiformes thorny seahorse threatened species undersea underwater vulnerable species wildlife zoology