Costasiella kuroshimae; Limapontiidae

We discovered Costasiella kuroshimae when taking a photo of an Avrainvillea algae at Mae Haad Reef. We realised that there were some small things moving on it; closer inspection revealed…
*As more info becomes available, it looks these are actually a mix of C. paweli and Costasiella sp.3. We are leaving it for now as correct identification is a controversial issue.*