Gruta das Areias is a complex of caverns located in the region of Lajeado, in the municipality of Iporanga, São Paulo, Brazil.
[2] It is also part of the so-called Açungui group of caverns formed between the Mesoproterozoic and Neoproterozoic, between 1.6 billion and 539 million years ago.
[3] This species of fish was later found in some creeks in the region of Bombas,[2] and invariably shaped the idea of a subterrain river connecting both caves with Ressurgencia das Areias das Aguas Quentes.
A topographic survey led by Michel Le Bret took place in 1960, and again in 1968, conducted by the Sociedade Excursionista e Espeleológica de Ouro Preto.
The connection was only possible in 1975 when Pierre Martin used fluorescein dye in the stream found inside the cave Areias de Baixo.