30 to 40 inches
Medium-sized
Varies
Compact and sturdy
1.8 to 2.3 meters (5.9 to 7.5 feet)
Large and robust
8-15 inches
Sleek and slender with a long tail
Varies depending on species, typically 2-8 inches
Segmented body with a cephalothorax and an abdomen, 8 legs
Varies depending on species, range from a few inches to over a foot in length
Compact and heavily built with spines on their bodies
Medium-sized, ranging from 20 to 26 inches
Medium-sized and muscular
30-32 inches (76-81 cm)
Large and slim
Medium
Compact and muscular
10-11 inches
Small and compact
Up to 4 inches
Stocky with a large head and a short snout
Varies depending on the species
Usually elongated and laterally compressed
Up to 3 meters
Large, bulky
0.75 to 12 inches
Tube-shaped
Up to 1 meter
Oval-shaped and slightly compressed
30 to 45 cm (11.8 to 17.7 inches)
Long and slender
70-92 cm
Large and powerful
6-8 feet
Streamlined and elongated