genome annotation information for mangrove-dwelling bivalve <i>Enigmonia aenigmatica</i> (Pectinoida: Anomiidae)

Enigmonia aenigmatica is a unique mangrove‑dwelling bivalve species with remarkable ecological and morphological adaptations, yet its genomic background has remained unexplored. In this study, we combined PacBio HiFi long reads, WGS short reads, Hi‑C data, Oxford Nanopore long‑read transcriptome sequencing, and Illumina short‑read transcriptome sequencing to assemble and annotate a high‑quality reference genome for E. aenigmatica. We obtained a chromosome‑level genome assembly with a total genome size of 465.97 Mb, comprising 8 chromosomes. The assembly exhibits exceptional contiguity, with a scaffold N50 of 58.83 Mb. Comprehensive gene annotation identified 17,728 protein‑coding genes. This chromosome‑level genome of E. aenigmatica provides a valuable genomic resource for future studies on mangrove‑associated bivalves, molluscan evolution, and ecological adaptation in intertidal environments.