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According to National Geographic, orcas are considered the largest species of the dolphin family. They weigh up to 6 tons (5,443 kilograms) and grow to 23 to 32 feet (7 to 9.7 meters). That is almost as long as a school bus. The largest orca ever recorded was 32 feet (9.8 m) long, according to Sea World.
STATUS: Vulnerable. DESCRIPTION: The orca, or killer, whale is the largest member of the dolphin family. Orcas have long, rounded bodies with large dorsal fins at the middle of their backs. Their black bodies are marked with white patches on the underside and near the eyes.ESCRIPTION: The orca, or killer, whale is the largest member of the dolphin family. Orcas have long, rounded bodies with large dorsal fins at the middle of their backs. Their black bodies are marked with white patches on the underside and near the eyes.