What is this (weed or flower (keep or not)) (1 Viewer)

[Mpolasek]

i found this about a month ago and thought it was neat since when i got these rocks there was only dead coral marks on the rocks now some mystery thing is on them but then it disappeared when i adjusted my rocks and lately has come back and it looks bigger and alive its black and has wavy little tentacles that sway in the current so the question is do i keep or do i panic and try and kill it
there was a frag stand i found in the sand that i got from trigger fan and i placed it under the light cause im curious

 

[DwPolcyn]

Kinda hard to tell from the pictures, looks like maybe algae? Definitely not weed though, pretty sure those don't grow in aquariums.

 

[Mpolasek]

lol so i guess i should sic my crab on it than

 

[DwPolcyn]

A more experienced reefer might know. @Cody

 

[Mpolasek]

ya ill wait a bit but ive never seen a black wavy algae

 

[DwPolcyn]

ya ill wait a bit but ive never seen a black wavy algae

Now I remember, I saw this everywhere at a LFS. I'm willing to bet it's some form of algae.

 

[OceansX]

I can't 100% see from the picture and I'm no Cody, however if it's loose and wavy, it's probably a microbial mishmash of cyano, algae, mold, & bacteria.

I usually vacuum out stuff like this during water changes, 100% if it's near a coral. It should easily vacuum out.

 

[PorpoiseHork]

I may be wrong, but it may be the beginnings of different strains of coraline algae starting to develop. Typically when coralline starts to develop you will see green patches pop up then purple and other colors depending on the varieties your tank is exposed to.

 

[Mpolasek]

well i see some purple but like grass, its hard to tell if its growing but the thing om worried about is the black thang with little string,tentacle, or hair-like little parts im just a little worried about fish if its bad