With its temperate climate and nitrogen-oxygen atmosphere, portions of Hydra Epsilon III featured muggy forests and swamps. Lifeforms included birds, trees, and ferns, some carnivorous. Dwarf trees resembled Earth maple and oak trees, but with short, mangled roots.
In 2267, an initial planetary survey was assigned to the starship USS Enterprise. James T. Kirk, Spock, Janice Rand, Vonda Figgs, Rojas and Klinsky beamed to the surface. Unfortunately, less than an hour later, two members of the landing party were killed and one injured by carnivorous plants. (SNW short story: "Yeoman Figgs")