You have introduced me to caecilians and oh my god what a creature
Two-colored Caecilian (Epicrionops bicolor), family Rhinatrematidae, found in disjunct populations in Ecuador, Peru, and Colombia
Caecilians are amphibians, like salamanders and frogs.
They are not worms, nor are they snakes.
photographs by Luis A. Coloma
Ringed Caecilian (Siphonops annulatus), family Siphonopidae, found in tropical South America, east of the Andes
The young go through the larval stage in the eggs, and hatch out as fully formed tiny caecilians.
The young of this species feed on their mother’s outer skin layer (which she sheds), which has a high nutrient content.
Like many caecilians, their skin exudes a thick slime, which aids in burrowing, but also has toxic components (presumably to protect from predation).
photographs by Dias, I and Carlos Jared
Fisher’s Caecilian (Boulengerula fischeri), family Herpelidae, Nyungwe National Park, Rwanda
photograph by Fabio Pupin
Rubber Eel Caecilian (Typhlonectes natans), family Typhlonectidae, found in Colombia and Venezuela
Photograph by  California Academy of Sciences
Banded Caecilian (Scolecomorphus vittatus), family Scolecomorphidae, Tanzania
These strange caecilians can move their little eyes in down into and even out of their skulls (at the base of these tentacles on the head). Its not well understood why.
photograph by Laura Bok & John Measey
Eiselt’s Caecilian aka “Penis Snake” Caecilian (Atretochoana eiselti), family Typhlonectidae, found in Brazil
Lungless, gas exchange occurs in the epidermis.
It is thought to be aquatic.
Only known from 9 specimens.
Little is known about their natural history.
photographs by Matt Roper
Banna Caecilian (Ichthyophis bannanicus), family Ichthyophiidae, Zhaoqing, China
Some herpetologists consider this species as a population of the Koh Tao Island Caecilian (Ichthyophis kohtaoensis).