Barracudas are fearless marine fish swimming in the world's tropical and subtropical oceans. They are known for their fierceness and 'ambush' hunting - they lie in wait and catch the prey by surprise.There are approximately 25 species of Barracuda. The best known is the great barracuda, which are usually hunted for game. Great barracuda can grow up to 1.8 m (6 ft) long and swims in the Atlantic from Florida to Brazil.The northern sennet, another type of barracuda, is 46 cm (18 in) long and can be found from Bermuda to the Gulf of Mexico. The European barracuda and some others are known to attack humans for no apparent reason; however this is very rare.