Paracondylactis sinensis is a burrowing sea anemone inhabiting soft sediments along the Chinese coast, representing an ecologically and economically important actiniarian species. Despite its unique adaptations to hypoxia and sediment-associated stressors, genomic resources for burrowing sea anemones have been lacking. Here, we report a high-quality, chromosome-level genome assembly of P. sinensis . With PacBio HiFi long reads (39.77 × coverage), Illumina short reads, and Hi-C data, a 210.63 Mb genome with a contig N50 of 8.70 Mb and a scaffold N50 of 9.41 Mb was generated. A total of 93.44% of the assembly was anchored to 19 pseudo-chromosomes. BUSCO analysis indicated 95.91% completeness, confirming high assembly quality. Comprehensive annotation identified 19,420 protein-coding genes, of which 91.35% were functionally annotated. Repetitive elements accounted for 26.43% of the genome, with transposable elements representing 20.47%. This genome provides a crucial reference for understanding the genetic basis of environmental adaptation in P. sinensis and supports future efforts in its conservation, aquaculture, and bioactive compound exploration.
Li et al. (2026) studied this question.