Specimens of Ulva sp. GE257 collected from coastal environments in Ecuador. (A) Occurrence of Ulva sp. GE257 in its stuarine habitat. (B) Cultivation of Ulva sp. on cane mesh structures used for biomass production and harvesting.

We present the complete chloroplast genome of Ulva sp. GE257 from Puerto El Morro, Ecuador. The genome is a circular DNA molecule of 92,301 bp with a GC content of 24.42% and encodes a total of 98 genes, 67 protein-coding genes, 26 transfer RNA genes, and three ribosomal RNA genes. Four introns were annotated, including one in the rrn23 gene and three in the psbB gene, which contains five exons. No inverted repeat regions were identified in the genome. In addition, the majority of the ORFs are located on the light strand.