ID Please

[Foooz]

Two different corals. I believe left one is dead (came with tank I bought) and one on right is alive though appears to be suffering. First can someone please ID these corals, second could the left one be bothering the right one? The right one was much more extended from all stalks a few days ago.

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[Marty.H]

Left hand one is dead and just a skeleton possibly a tracky I'm not sure not that up on skeletons.

The right hand one looks like a Branching Hammer that does not look happy at all its clamped and has some dead heads