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Big, up to 1 m. With hump on its forehead and beautiful pattern. Green and blue.
reminiscent of the insignia of a military Sergeant Major. It grows to a length ...
Usually seen with its head portruding from the sandy bottom as shown in this ...
that forms on its head above the eyes, becoming more prominent as the
. They feed nocturnally on small fish and ...
legs are red-orange. It catches fish by ...