WTH is this thing?

[Michigan Tree Murderer]

This is on a ficus microcarpa, looks like a hole in the trunk, or a portal to another dimension. Is this normal?

 

[casun]

Yes, portals to other dimensions are quite normal.

 

[Shibui]

Not clear what you are referring to
I see spaces betwen trunk and roots - no problem.
Maybe there is a dark split in the lower left root? Could be 2 roots growing close together? Could be damaged root with interior rotted out? Neither are life threatening.

 

[sorce]

Looks like a mango seed.

Sorce

 

[Michigan Tree Murderer]

Not clear what you are referring to
I see spaces betwen trunk and roots - no problem.
Maybe there is a dark split in the lower left root? Could be 2 roots growing close together? Could be damaged root with interior rotted out? Neither are life threatening.

This. It's part of the trunk, it's wood & about half an inch deep.

Yes, portals to other dimensions are quite normal.

Just trying to avoid this

 

[Shibui]

This. It's part of the trunk, it's wood & about half an inch deep.

Part of the trunk or part of a root? Looks like a root growing out of the trunk just above and down to the soil??
In any case part of the trunk/root has been damaged and the bark died. Ficus wood is soft so rots easily and caused a hollow in the wood. Surrounding bark is healthy and has started to heal up along the edges - looks a little like lips.
My guess, from the callus along the edges, is that damage occurred months, maybe years ago. It is not immediately recent and is also not fatal. Sometimes damage like this is not noticeable because it is covered by the old bark for months or sometimes years until the bark gets pushed off or rots away.

 

[19Mateo83]

Looks like an oyster growing in that tree!