Abstract
Tetraselmis marina (Cienkowski) R.E.Norris, Hori & Chihara 1980, a marine green microalga, holds considerable value in aquaculture due to its well-rounded nutritional profile. Gaining insights into the mitochondrial genome of this species is crucial for advancing studies on its phylogeny and evolutionary relationships. In the present research, we for the first time characterized the complete mitochondrial genome of T. marina. This genome forms a circular structure with a total length of 51,196 base pairs (bp), encompassing 34 protein-coding genes, 24 transfer RNA (tRNA) genes, and 3 ribosomal RNA (rRNA) genes. Nucleotide composition analysis showed a relatively balanced distribution: adenine (A) accounted for 32.9%, thymine (T) for 33.8%, guanine (G) for 16.5%, and cytosine (C) for 16.8%. Phylogenetic investigations demonstrated that T. marina is classified within the Chlorodendraceae family and shares the closest evolutionary affinity with Tetraselmis sp. CCMP 881.