Currently, in my 300 gallon reef:
"the wolf pack"
1 Blue linka starfish ~ 2 years
3 Red Serpent Stars ~ 3 years (largest is about 18" in diameter).
6 Maroon / brown Hawaiian brittle stars ~ 8 months.
1 Brown / black striped serpent star ~ 1 year
1 Green brittle star ~ 2 months (very small)
1 Brittle star (species/name unk to me)newest addition. Appears to have scared my Multifaciatus gobies into hiding on the opposite end of the tank from this star!
No problems with any of these starfish regarding harming / damaging corals & invertebrates. The 3 red serpent stars do occasionally fight between themselves - one trying to pin the other down
Have been looking for a purple Linka!
Steve/SPC: Only the burrowing sand star is detrimental to DSB, due to its predatory nature. Of course they can't completely decimate a DSB, but, they can come close!