Figure 1. A cross-section of an Aiptasia polyp demonstrates the aposymbiotic mode on the left and a colonized polyp on the right hand side. Whilst this image is of the same species and does not show the difference in colour based on species differences, it is an apt example as to how symbionts contribute to the external morphology of Aiptasia. This image has been sourced from The Grossman and Pringle Laboratories (2018).