Simplify the following text for a Grade 8 native English-speaking person.
Original: The diet of caecilians is not known well , though it seems it mostly consists of insects and invertebrates found in the habitat of the respecitive species .
Simplified: The diet of caecilians is not well-known . Mature caecilians seem to feed mostly on insects and other invertebrates found in the habitat of the respective species .