Chromosome-level Genome Assembly and Annotation of the bighead beaked sandfish (Gonorynchus abbreviatus)

Gonorynchus abbreviatus (bighead beaked sandfish), is a demersal fish inhabiting the deep waters of the Northwest Pacific for which genomic resource have been limited. Here, we assembled a chromosome-level genome using DNBSEQ, PacBio, and Hi-C sequencing technologies. The final 609.20 Mb assembly achieved a scaffold N50 of 22.33 Mb and was anchored onto 27 chromosomes, with 99.07% completeness based on BUSCO assessment. Repetitive sequences comprised 32.88% of the genome, mainly DNA transposons (12.33%). We identified 22,396 protein-coding genes, of which 21,429 (95.68%) were functionally annotated. This high-quality genome constitutes a valuable resource for investigating the evolutionary history and genetic mechanisms of G. abbreviatus.