Caecilians can be found in moist soil near rivers and streams in tropical regions.
Caecilians belong to the order apoda or gymnophiona.
Members of the apoda order can be found in streams in tropical regions.
Members of the Apoda order can be found in _.
  rivers in tundra regions.
  They have webbed feet
  female sex cells
  epidermis and dermis
  rivers in arid regions.
  streams in arid regions.
  microorganisms
  streams in tropical regions