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This spongy-looking creature is a frogfish (frog-fish).  It's a hard fish to spot, which makes it a good hunter!  It can open its mouth-wide!-and suck in a tasty fish in a flash.  Frogfishes, family Antennariidae, are a type of anglerfish in the order Lophiiformes.  They are known as anglerfishes in Australia, where 'frogfish" refers to a different type of fish.  Frogfishes are found in almost all tropical and subtropical oceans and seas around the world, the primary exception being the Mediterranean Sea.  Frogfish have a stocky appearance, atypical of fish.  Ranging from 2.5-38cm ( 1-15 inches) long, their plump, high-backed, non-streamlined body is scaleless and bare, often covered with bumpy, bifurcated spinules.  Their short bodies have between 18 and 23 vertebrae and their mouths are upward pointed with palatal teeth.  They are often brightly colored, white, yellow, red, green, or black or spotted in several colors in order to blend in with their coral surroundings.