Caecilians have been little studied in this respect, but the Cayenne caecilian (Typhlonectes compressicauda) produces toxic mucus that has killed predatory fish in a feeding experiment in Brazil.
kiːsˈɪliənz hɐvbɪn lˈɪɾəl stˈʌdid ɪn ðɪs ɹᵻspˈɛkt, bˌʌt ðə keɪˈɛn kiːsˈɪliən tˈaɪfloʊnəkts kəmpɹˈɛsɪkˌɔːdə pɹədˈuːsᵻz tˈɑːksɪk mjˈuːkəs ðæt hɐz kˈɪld pɹˈɛdətˌoːɹi fˈɪʃ ɪn ɐ fˈiːdɪŋ ɛkspˈɛɹɪmənt ɪn bɹɐzˈɪl.