The Srivani vessel was a type of small craft used by the Srivani in the late-24th century. It was equipped with stealth technology to render it invisible and intangible at a phase variance of 0.15.
In 2374, two such vessels were docked with the USS Voyager while the crew was unknowingly put through several medical experiments. When Voyager began to approach a binary pulsar, the two ships evacuated but one was destroyed. (VOY: "Scientific Method")