Descendants of Odobenocetops leptodon.
They have the ability to oscillate at high frequencies and use their tusks to drill into asteroids and other celestial bodies from which they feed.
Somewhat nomadic, they typically stay within the Celestial Cetaceans territory but do sometimes wander about the galaxy.
Currently they are reported to be gathering in what seem to be the edges of the Celestial Cetacean territory.
Typical size is ~7ft long.