Great White Shark
The white shark (Carcharodon carcharias), which is also called great white shark or white pointer, may be the fish that needs no introduction, because it is one of the most powerful and potentially dangerous predatory sharks in the world
Moray Eel
Moray eels differ from other eels in having small rounded gill openings and in generally lacking pectoral fins. Their skin is thick, smooth, and scaleless, while the mouth is wide and the jaws are equipped with strong, sharp teeth, which enable them to seize and hold their prey (chiefly other fishes) but also to inflict serious wounds on their enemies, including humans.
Tigerfish
Spanning several species, tigerfishes are so named on the basis of their pugnacity when caught, their fiercely predaceous habits, or their appearance.
Piranha
Piranha, also called caribe or piraya, are any of more than 60 species of razor-toothed carnivorous fish of South American rivers and lakes, with a somewhat exaggerated reputation for ferocity. In movies such as Piranha (1978), the piranha has been depicted as a ravenous indiscriminate killer. Most species, however, are scavengers or feed on plant material.
Stonefish
Stonefish are venomous marine fish classified in the genus Synanceja and the family Synancejidae, found in shallow waters of the tropical Indo-Pacific. Difficult to see, they can, when stepped on, inject quantities of venom through grooves in their dorsal-fin spines. Wounds produced by these fish are intensely painful and sometimes fatal
Puffer
Many species are poisonous; a highly toxic substance, tetraodontoxin, is especially concentrated in the internal organs. Although this substance can cause death, puffers are sometimes used as food. In Japan, where the fishes are called fugu, they must be carefully cleaned and prepared by a specially trained chef.
Lionfish
Lionfish are incredibly venomous fish that are native to the Pacific Ocean, although they have now invaded many other oceans. They reach around 18 inches long and are characterized by their bright colors. Lionfish can have red, white, or black bands and have spiky fin rays which are venomous.
