[1] Clathria aceratoobtusa is an encrusting sponge forming patches 0.4 to 2 mm (0.02 to 0.08 in) thick.

[2] Clathria aceratoobtusa occurs in the tropical Indo-Pacific region, its range including Myanmar, Malaysia, Thailand, the Philippines, Micronesia and northern Australia.

[3] In the 21st century, it has appeared for the first time in Gulf of Mannar Marine National Park in southern India, where it is causing concern by its invasiveness.

Clathria aceratoobtusa is an encrusting sponge found on reefs growing over the surface of rocks, bivalve molluscs, shell debris, coral colonies and worm tubes.

[4] In India, where this sponge is a non-native, invasive species, the corals most affected by it are Porites, Acropora, Montipora, Favia and especially Turbinaria, which appears to be its favoured substrate.