The chromosome-level genome sequences of the freshwater sponge, <i>Spongilla lacustris</i> (Linnaeus, 1759) and the chlorophyte cobiont <i>Choricystis</i> sp., and the associated microbial metagenome sequences

We present a genome assembly from an individual <i>Spongilla lacustris</i> (freshwater sponge; Porifera; Demospongiae; Spongillida; Spongillidae). The genome sequence is 248.7 megabases in span. Most of the assembly is scaffolded into 23 chromosomal pseudomolecules. The mitochondrial genome has also been assembled and is 28.04 kilobases in length. A 14.6-megabase genome assembly of the green algal cobiont <i>Choricystis</i> sp. (Chlorophyta; Trebouxiophyceae) was scaffolded into 16 chromosomal pseudomolecules. Additionally, three bacterial metagenome bins were recovered from the same sample. Gene annotation of this assembly at Ensembl identified 30,435 protein coding genes.