1 Also within you've got 3A and B, 3C was the Asbestopluma that 



2 sponge pen that I showed you that like the semi-consol idated sediment, 



3 that you would find on the walls of the canyon in this vicinity. 



4 Then basically moving further down you have this large area which 



5 I've designated as zone 4. This does not go down into the axis of the 



6 canyon, and that is basically characterized by having low concentrations 



7 of deep-sea eels and having an occasional sea pen. 



8 Then, when you get down into zone 5, which extends all the way 



9 into the canyon, below 1,500 meters, you do not get so much canyon slope 



10 differentiation, largely because that brittle star, the Ophiomusium that 



11 I mentioned. It's very ubiquitous, it is very, very common where it is. 



12 That does mean that the fauna in the axis of the canyon at that 



13 depth was not different, it just means that it's numerically overwhelmed 



14 by the Ophiomusium. 



15 Basically what I want you to get from this is the majority of the 



16 axis of the canyon cannot be characterized. These were the other 



17 clusters, and basically it jumps between 7A and IC and 7A and you could 



18 not map these into a band. It's very, very patchy down within the axis 



19 of the canyon and up on the walls of the canyon it's exceptionally 



20 patchy. 



21 What I'm also cautioning you about is within these regions here 



22 where I have mapped zones, I'm only mapping them saying, hey, the 



23 critters in this area are only 15 percent similar. This is not a very 



24 high faunal similarity. 



25 So, basically what I want you to come away with is one, the 



26 animals are all very patchily distributed. Some of this can be explained 



27 by substrate differences of what is available, what attachment sites are 



28 available, but some of it cannot be. 



29 The Penatula achiliata, that Ophiura species, the Asbestopluma, 



30 that sponge pen, this cannot be explained by substrate differences 



31 alone, and that they're other things going on in that canyon that are 



32 responsible for the patchiness and the distribution of these animals, 



33 also for having all of these filter feeders. 



Ill 



