Detail of an anchor coral (Euphyllia ancora) growing in Lembeh Strait, Indonesia.

anchor bubble coral anchor coral animal animal themes animals in the wild anthozoa aquatic background biogeography bizarre cnidaria color image coral day ecology endangered species euphyllia ancora euphylliidae full frame green hammer coral hammer euphyllia hammerhead coral horizontal indonesia invertebrate lembeh lembeh strait marine biology natural patterns no people outdoors pacific ocean photography polyp ridge coral scleractinia sea life southeast asia sulawesi textured torch coral undersea underwater wildlife