This is a cave for shrimp with two entrances meant to be buried under the substrate of your tank.
The default dimensions are 50mm x 127mm x 69mm (max height of entrance tube). Theoretically you should have no issue scaling it so suit your needs in your slicer.
I printed this vertically with the front open side down using organic supports. This got me pretty clean results tho there may be more efficient orientations.
The author marked this model as their own original creation.