User blog comment:Commander Evan Spock/Borg blog posting/@comment-1340488-20091219001053

let's look at it like this...

The Borg have external, functional implants visible on the surface (as we all can see), but the internal, vital functioning implants and the nanites are kept safe from aquatic damage by the skin, which is bioelectronically reinforced to be water proof.

Just a thought...