I just hope Iran isn’t amassing it’s formidable aircraft carrier groups and heading our way. Their subs and destroyers are fearsome too.
Would you believe two Boy Scouts in a rowboat? (Maxwell Smart voice)
I may be wrong, but I think they do have some (near) silent running diesel subs.
I checked, and here is a resource I found.
They do have “some” capabilities, and could thus be an annoyance to be sure.
https://www.nti.org/analysis/articles/iran-submarine-capabilities/