This thing was stuck to the side of my tank please Help

[1stPhantom]

Ok so I just added 5 RFAs to my tank today I come back after about 2 hours and I see this guy on the side of my tank have no clue where to even start looking it has what to be at least 100 tiny white tentacle like appendages all over it

 

[NonstopSoda]

It kinda looks like a baby sea cucumber to me! But im just guessing, @ISpeakForTheSeas might know what it is

 

[VintageReefer]

Wow. Cool!

 

[ISpeakForTheSeas]

It kinda looks like a baby sea cucumber to me! But im just guessing, @ISpeakForTheSeas might know what it is

Yeah, looks like a little cuke of some kind to me. Probably a sediment/deposit-feeding kind (so probably a sand-sifting cuke).