Tennysonia stellata forms colonies that

  • consist of bifurcating branches that are rounded triangular in cross-section
  • grow to about 4cm, possibly larger
  • range in colour from pale rose tint to bright orange, the colour fading in dead specimens
  • have a skeleton made of calcium carbonate mineral - calcite

Like other bryozoans, T. stellata exhibits zooidal polymorphism, with the feeding zooids arranged in rows.


Many morphological characteristics, such as the presence of kenozooids and gonozooid morphology, are shared with another bryozoan called Heteropora.

 However, Heteropora is placed in a different division - suborder Cerioporina. This demonstrates how similar morphologies have developed by convergent evolution in this group of bryozoans.