A new video highlights the Kelpian, Saru, played by Doug Jones.
In the video, Jones describes his alien character, and the preparations required to transform from human to Kelpian.
Some of the others on the three minute video speaking about Jones or Saru include Akiva Goldsman, Alex Kurtzman, Doug Jones, Aaron Harberts, Gretchen Berg, and Sonequa Martin-Green.
— Star Trek: Discovery (@startrekcbs) October 10, 2017
Source: StarTrekCBS Twitter Page