I found what appears to be four black oval shaped things on my live rock. They very in size from about 5/8" to 1" and are very flat. They appear to have two very small antennae at one end. They are slimy with no hard shell. They have not moved in 4 weeks.
Hmm... Could they be tunicates? (Try searching google for "tunicate" or "sea squirt" which is a common name for them). Where did your live rock come from?
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