johnny bananas: wow. johnny bananas (voiceover): a steep drop off into an ecosystem to rival any other. johnny bananas: looks like i can literally reach out and like, touch this stuff. [music playing] bruce brandt: yeah. johnny bananas: oh my god, look! bruce brandt: this is finger coral. it looks like finger tips pointing up. and that's a lot, right? bruce brandt: yeah, that's a whole colony. oh, we got a bunch of jacks in front us just passing, right there. johnny bananas: just cruising. [music playing] i've never been in water this clear, ever. our reefs are pristine, clear, warm waters, healthy reefs. [music playing] johnny bananas (voiceover): as we dive deeper. johnny bananas: wow, it's getting dark. johnny bananas (voiceover): daylight diminishes. and with the darkness. we're almost at 500 feet. johnny bananas (voiceover): comes a whole new world. johnny bananas: that's a lionfish. he's chasing us. bruce brandt: yeah, well, he's using our light to hunt, actually. johnny bananas: ok. oh, there's a l