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Mark, One of our friends who dives the bridge a lot says it is probably a "sargassum crab or Purtunus sayi," a crab that comes in on the sargassum weed. Tom

Goluchmas, You have another PM. Tom

You have a PM. Tom

Sea, On the small chance you don't have the manual, here's a link (DuckDuckGo is your friend!): https://usermanual.wiki/Light-And-Motion/LightAndMotionBluefinHc7UsersManual571924.1108271667 Hope this helps, Tom

Hotglove, I thought about responding and then the words of wisdom on a T-shirt that my kids gave me (I wonder why LOL) occurred to me instead: DGMS Don't Get Me Started. Must. Not. Get started... Tom

What I'd like to find is an unwanted back half of an Olympus PT-058 or PT-059 plastic underwater housing. I'm trying to adapt and AOI viewfinder to another housing and wish I had the little grooved rails that the viewfinder snaps onto, if that makes any sense. If the housing is otherwise damaged or unusable, it doesn't matter. Let me know if you have one. Thanks, Tom

I like the commercial fishing floats too. Here's another US-based source: https://www.memphisnet.net/category/floats-pvc I have used these and like them at least down to 100 FSW. I spray-painted most of them black just because Tom

Kraken, Look here: https://www.shellmuseum.org/shell-guide and then see the entry for "Pleurobranchaea inconspicua" under the "Family Pleurobranchidae" Tom

I prefer these. Here's why: I don't have to look at them when I'm loosening or tightening, and I find them slightly easier to turn. Alas, they're out of production; formerly known as Aquatica TLC clamps. Tom

For you blackwater divers (and everyone else to be sure...) here's a fascinating article from The Smithsonian about aquatic animals and their daily vertical migration: https://www.smithsonianmag.com/science-nature/what-drives-aquatic-animals-to-make-vertical-migrations-180979172/?utm_source=smithsoniandaily&utm_medium=email&utm_campaign=20211207-daily&spMailingID=46066346&spUserID=NzE1OTY3OTQ2MTczS0&spJobID=2140798550&spReportId=MjE0MDc5ODU1MAS2 Enjoy, Tom (Note to mods: if this isn't the correct forum, please move!)

Sid, What is the model number? Age of light/battery? Location? Thank you, Tom

I looked a little further at the iPhone and concluded, possibly correctly, that its "macro" was simply digital zoom and not optical zoom. My enthusiasm went to zero at that time... Tom

Craig, Curiosity: just prior to the end of the clip I thought I saw the lionfish. If so, do you have that clip too? Did the DM get it? Tom

Bub, I wonder if the macro capability of the iPhone 13 will be supported? Tom