……..two things, then.
SPACE HIPPOS (the celestial guardian of the Nile-In-Splendor)
and
BLACK HOLE KELPIES (so beautiful but to touch is to be pulled in, and drown)
Krakens lurching in asteroid belts
Sirens using beautiful, attracting colors insteand of sound
Dude, sirens mimicking the distress calls of various spacefaring races
Nice ! As there is no sound in espace, they would use either light or electromagnetic waves (I might be wrong on this) which mean they could also mimic the distress signal of satellite and spaceships !
Yaaaaaaaaaass.
Giant cephalopods using their camouflage to look like a ship so once you “dock” you get engulfed.