are these safe

[salt reefer]

i think they are sea squrts i have about 5 two are about 2 1/2 inches long and about 1 1/2 inches wide .all are orange except one thats brown. are the safe because i like them . they dont move at all

 

[salt reefer]

opps heres a pic.
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[brianjfinn]

Pretty sure they're just filter feeding sponges. Shouldn't be a problem.

 

[fish scales2]

IMO great addition to a reef as long as the system is well established and there is enough food being produced or fed.

 

[salt reefer]

cool tks. i love them.