Bagarius bagarius (Dwarf Goonch) is the largest freshwater fish of Bangladesh. Blue wheal is the largest animal of the world reaching up to 10 m. The oarfish (Regalecus glesne) is the world’s largest teleost, reaching lengths of 8 m to as much as 12 m. Whole specimen are rare. Whale shark is the largest fish. Most sharks are harmless- at least to humans. Nevertheless, 25 species of sharks are …read more