Up to 2 meters
Long and segmented body with a pair of large frontal appendages
Varied
Up to 90 feet
Long and slender
Up to 3 meters (10 feet)
Heavy and robust
Approximately 5 feet
Large and robust
3 to 6 centimeters
Rounded shell with extended mantle
Up to 8-10 inches (20-25 cm)
Flattened and disc-shaped
8 to 15 millimeters (0.3 to 0.6 inches)
Compact and streamlined
Varies depending on the species (approximately 12-22 inches)
Compact and streamlined body with a small head and short beak
24 to 28 inches (61 to 71 cm)
Lean, muscular
Adults can grow up to 2-5 inches (5-12 cm)
Large and elongated
Approximately 3 feet
Large and flightless
4-5 meters
Large, heavily armored
Varies depending on breed
3 to 5 millimeters
Oval-shaped
24 to 27 inches
Athletic and muscular
23 to 27 inches
Powerful and muscular
8 to 12 feet
Streamlined and muscular