Average length of 1.2 meters
Slender and cylindrical
24-30 centimeters (9.4-11.8 inches)
Elongated with small limbs and no external eyes
18 to 28 inches
Chunky
Up to 10 feet (3 meters)
Long-tailed
2.1 to 2.5 meters
Horse-like
Up to 7 centimeters
Unusual body shape with a long segmented body and a head with multiple pairs of grasping spines
Opah can grow up to 6 feet in length
Opah have a round, disc-shaped body with a tall dorsal fin
Opaleyes can reach a maximum length of up to 40 cm (16 inches).
Opaleyes have an elongated and slightly compressed body shape.
13 to 37 inches (33 to 94 cm)
Small to medium-sized with a long, smooth, and slim body
Up to 8 inches (20 cm)
Elongated and compressed
Approximately 15 cm (6 inches)
Large and robust
3-5 feet (0.9-1.5 meters)
Short and stocky
2-5 mm
Small, round abdomen
16-18 cm
Small to medium-sized bird
12.7-14 cm (5-5.5 inches)
Small, with a thin, pointed bill and short legs
1.2 to 1.5 meters (4 to 5 feet)
Large and stocky
Varies
Round abdomen, slender legs
