Blue Devil keeping an eye out

Blue Devil keeping an eye out

Blue Devil keeping an eye out

This huge blue devil was shyly following my movement in an overhang among the kelp beds off Port Lonsdale, Victoria. Camera: Sony DSSC F717 in a Gates housing with Amphibico 10W HID light.

2004-04-20

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Human Dim Sim in space - or how not to use your SMB!Human Dim Sim in space - or how not to use your SMB!
A useful safety device for most divers is the surface marker buoy. In essence it is an easily seen surface float which is connected to the diver by means of a thin, strong line, usually carried on a reel.
Underwater Card 2