New echomap blemish

[MikeF]

Or mold in some text that says "vent" near it

Oh Boy.

I could just see the next thing on BBC would be someone recommending poking the hole marked "vent" to make sure it's clear.

[kojimep]

With such a hole, can it be IPX7?

Yes it can. Most likely it's a vent made by Gore that's hydrophobic and oleophobic. They are commonly used for venting on electronics, electric motors, auto transmissions, etc... and can be submerged without allowing water through.