It was our day off and we were supposed to go whale watching in Kaikoura today. Unfortunately the wind blew up, the waves got big and our trip was cancelled. What a bummer - we were looking forward to getting out on the water.

We've been talking about sperm whales a bit in our slide show. Of course a few whale species dive down to seriously deep areas to feed. This includes around seamounts.

Affectionately known to us as Squiddley, this photo of a glass squid was taken in Dunedin and has been used as the global icon in this campaign of the unknown worlds of the deep sea.

But, you might be thinking, the fair shores of Dunedin isn't exactly the deep sea. What are these people on about.

Well, glass squid are our most common native squid. As juveniles they live in the top few metres of the waves. But when they become adults - about 30 cm long - glass squid swim down to live around deep sea floor.

It's during this phase of their lives that Squiddleys become the staple diet of sperm whales diving down for a feed. The impacts of bottom trawling may well be disrupting sperm whale diets - but like so much of the life in the deep sea, we can surmise, but we simply don't know.

However, it's pretty obvious that when fragile deep sea habitat are wiped out, not only is there huge impacts on all the invisible life down there, but the impacts continue all the way up the food chain to the very visible sperm whales.

Everything is connected.