Geodia megastrella is a species of sponge in the family Geodiidae.

It is a type of demosponge found in the deep temperate waters of the North Atlantic Ocean.

[2] When the DNA sequence of Geodia megastrella that is found in the Gulf of Cadiz was compared to a depressio-minibarcode sequence from two other Geodia megastella samples it was found to be one hundred percent identical.

[1] Geodia megastrella has only been found in the Northern Atlantic Ocean, above the equator., However, its range is very wide.

It has been observed in the following countries:[4] Deep-water sponges (Porifera) from Bonaire and Klein Curaçao, Southern Caribbean