Do caecilians have exoskeleton

No, caecilians do not have an exoskeleton. They are a group of limbless amphibians that possess a smooth, moist skin which is more akin to that of other amphibians like frogs and salamanders. Instead of an exoskeleton, their bodies are supported by an internal skeleton made of bone. Caecilians are adapted for a burrowing lifestyle, which is reflected in their cylindrical shape and lack of limbs.