Lithophyllum orbiculatum

[3] The coralline algae lives in the mid-tide and higher level pools, occasionally exposed to air.

[4] The coralline algae has a rough and chalky texture, and the color can range from grey, brown, and pink.

Younger specimens will be relatively thin, up to 1 mm thick, with their margins being attenuated and crimped.

Specimens found in areas prone to exposure have thalli that form protuberances that may reach 5 mm tall.

[4] They reproduce using uniporate conceptacles, which are cavities where the reproductive organs of algae are found.