A green anaconda in Colombia

A green anaconda in Colombia

Green anacondas are extremely large snakes. They have an average length of about 5.5 meters (18 feet), though some can reach 9 meters (30 feet). They can also weigh as much as 250 kg (550 pounds).
© mlharing—Creatas Video/Getty Images
  • Encyclopædia Britannica, Inc.
    These snakes mean business.
  • Encyclopædia Britannica, Inc.
    We've misidentified these snakes for almost 200 years.
  • Encyclopædia Britannica, Inc.
    You can say that all tortoises are turtles, but not all turtles are tortoises.
  • Encyclopædia Britannica, Inc.
    Learn some interesting facts about turtles.