The giant green anemone, Anthopleura xanthogrammica, can be vivid green or golden-brown-green depending whether it is symbiotic with the chlorophyte Elliptochloris marina or with the dinoflagellate Breviolum. Moreover, individual A. xanthogrammica can sometimes associate with both symbiotic species from different phyla mixed within individual anemone at the same time found, from northern California to Washington. It also is not uncommon to find anemones that are aposymbiotic (without symbionts) in habitats covered with sand, shaded, or recently exposed to high temperatures.
We present a genome assembly from a specimen of Anthopleura xanthogrammica (giant green anemone; Cnidaria; Anthozoa; Actiniaria; Actiniidae). The genome sequence has a total length of 290.04 megabases. Most of the assembly (97.36%) is scaffolded into 19 chromosomal pseudomolecules. The mitochondrial genome has also been assembled, with a length of 20.04 kilobases. Gene annotation of this assembly by Ensembl identified 25,034 protein-coding genes.
Bedgood, S., M.N Dawson, G. Oatley, E. Sinclair, E. Aunin, N. Gettle, C. Santos, M. Paulini, H. Niu, V. McKenna, R. O’Brien, et al. 2026. The chromosomal genome sequence of the giant green anemone, Anthopleura xanthogrammica (Brandt, 1835) (Actiniaria: Actiniidae) [version 1]. Wellcome Open Research, 11:566 (https://doi.org/10.12688/wellcomeopenres.27544.1)