Cymbastela lamellata is a species of marine sponge in the family Axinellidae.

[3][1][2] It is known from both the Chatham Islands and from waters around Tasmania, where it has been found at depths of 6–90 m. It is a sessile, filter feeder.

[3] C. lamellata is a dominant marine sponge in Fiordland, New Zealand.

A mass bleaching event (akin to coral bleaching) of C. lamellata was reported throughout much of Fiordland following a heatwave in mid-2022, causing C. lamellata to expel their symbiotic algae.

This was the largest case of temperate sponge bleaching ever recorded.