The Soritoidea is a group of miliolid benthic foraminifera with porcellaneous tests.

They take on a variety of growth forms but typically have many chambers.

Some soritids can grow over a centimeter across, huge for protists.

All Soritoidea keep algal endosymbionts, which may be what allows them to achieve such large sizes.

These larger symbiont-bearing foraminifera are typically found in the oligotrophic waters of the tropics.