Caecilian Weight: Species-Specific Sizes & Sizes

The weight of caecilians varies greatly depending on the species. Some small species, such as the Brazilian caecilian (Siphonops annulatus), weigh only a few grams, while larger species, such as the giant caecilian (Caecilia thompsoni), can weigh up to 1.5 kilograms (3.3 pounds).