Abstract
We present a genome assembly from a specimen of Trididemnum clinides (photosymbiotic ascidian; Chordata; Ascidiacea; Aplousobranchia; Didemnidae). The T. clinides genome sequence has a total length of 906.92 megabases. Most of the assembly (97.83%) is scaffolded into 23 chromosomal pseudomolecules. The mitochondrial genome has also been assembled and is 14.98 kilobases in length. The host ascidian has multiple symbionts, including Prochloron, a cyanobacterial genus that can also synthesise bioactive natural products of interest for potential therapeutic development. Biosynthesis of active compounds sometimes involves microbial associates.