Macandrewia is a genus of sea sponges, and is the only genus in the monotypic family Macandrewiidae.

Species are cup-shaped, expanded, more or less sinuate or lobed.

They are attached to the substrate by a more solid base.

It is supported by a siliceous cup-shaped axis.

The upper surface is covered in of pores, which are grouped into roses which are surrounded by radiating grooves.