Venn diagram showing numbers of polyp-specific transcripts. Transcripts significantly up- or down-regulated (padj < 0.05) in a particular polyp when compared to either of the other two polyp types from both edgeR and DESeq were considered polyp-specific. The intersection of each circle is the number of transcripts down-regulated in the polyp type excluded from that intersection (e.g. 20 transcripts are down-regulated in the dactylozooids). Down-regulation of a transcript in a particular polyp type equates to equivocal up-regulated expression in the other two polyp types.