What kind of bug is this?

Thanks everyone, all answers are helpful, nug was first but grannies gave me an idea of what bug it actually is. Thanks again everyone.

Looks like a Giant Water Scavenger beetle to me. They eat both decaying plant matter, fish and insects. It could also eat live plant matter but usually they stick to small insects and fish.. You will easily be able to notice this by seeing chewed leaves. Since they also eat insects so it could of been searching to larva in your soil. I would say get rid of it, But don't stress over it as it will not infest your plant. Happy Growing

This is not a pest and not harmfull for your plant.