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Post by 1dave on Jun 25, 2022 14:59:08 GMT -5
Ammonites were shelled cephalopods that appeared during the Devonian and died out about 66 million years ago.
Durangites existed at the end of Jurassic time.  They were gone by the time of the BIBLICAL FLOOD, . . . but some other fossils must exist to mark it in the lithic pages of what I call "God's First Book."
 I was always used to think (quote from Georgette Heyer) those sutures were just the end of one growth period (like a rattlesnake molting) and the beginning of a new growth period. New Information!
   Ammonites and sea slugs are related. What are those sutures really doing? I belatedly now think they serve the same functions! Intake and expel fluids and gas, change buoyancy, eat Man O' War? If they began like this:  They must have started with 8 - 10 septa. NOT an annual individual thing. |
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Post by amygdule on Jun 25, 2022 21:10:28 GMT -5
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Post by amygdule on Jun 25, 2022 21:16:28 GMT -5
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Post by rockpickerforever on Jun 25, 2022 22:30:36 GMT -5
That looks pretty cool, Dule! It looks like an alien land scooter (think the first Star War's Mark Hamil's scooter), zipping over the ground on his home planet like a hovercraft! The ocean is full of wonderful creatures! |
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Post by vegasjames on Jun 25, 2022 23:15:56 GMT -5
Nudibranchs are pretty cool. Largest one I have ever seen was while diving off of Rat Beach in California. Went from my fingertips to my elbow. Estimated it weighed maybe 15 pounds. I had it on my arm and I could feel it's foot sucking through my wetsuit.
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Post by rockpickerforever on Jun 25, 2022 23:46:07 GMT -5
There are no colorful nudibranchs in the waters off SoCal. Too cold, probably. I think the colorful ones, are mostly found in warmer water.
What I have seen off San Diego are fat, ugly, brown blobs they call Sea Cows.
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pizzano
Cave Dweller 
Member since February 2018
Posts: 1,390
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Post by pizzano on Jun 26, 2022 0:30:48 GMT -5
Nudibranchs are pretty cool. Largest one I have ever seen was while diving off of Rat Beach in California. Went from my fingertips to my elbow. Estimated it weighed maybe 15 pounds. I had it on my arm and I could feel it's foot sucking through my wetsuit. Rat Beach Torrance SoCal........?......how deep....how far out.......very unlikely, if you're talking with any color at all......I've fished off that coast land & sea for many years......! |
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Post by vegasjames on Jun 26, 2022 1:36:47 GMT -5
There are no colorful nudibranchs in the waters off SoCal. Too cold, probably. I think the colorful ones, are mostly found in warmer water. What I have seen off San Diego are fat, ugly, brown blobs they call Sea Cows. Actually I have seen some small colorful ones diving off of Southern California, but they are very rare. Usually see them more in the Gulf of Mexico.
I have seen several things that are not supposed to be where they were in the ocean. Found a live textile cone snail up in Oregon when I was younger. Not waters they are supposed to be found in as they are generally warm water. Seen oceanic white tip sharks diving off of Southern California, which are not supposed to be in those waters. I found one species of shark I have never see or heard of before. It was a type of horn shark, but with stripes instead of spots. Was not a zebra horn shark though. Every once in a while currents change from North to South to South to North bringing life to Southern California not normally found there. For instance, there was one year when this happened and there was jumbo squid normally found in Southern Mexico waters washing up on beaches in Southern California.
This one was not colorful either, actually solid black. I still think they are cool looking. I was just surprised by the size. Had never seen nudibranchs so large before.
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Post by vegasjames on Jun 26, 2022 1:43:52 GMT -5
Nudibranchs are pretty cool. Largest one I have ever seen was while diving off of Rat Beach in California. Went from my fingertips to my elbow. Estimated it weighed maybe 15 pounds. I had it on my arm and I could feel it's foot sucking through my wetsuit. Rat Beach Torrance SoCal........?......how deep....how far out.......very unlikely, if you're talking with any color at all......I've fished off that coast land & sea for many years......! Yes, Southern California.
I almost exclusively shore dive and stay within 60 feet and within a mile of shore. Very hard to find deeper waters shore diving in Southern California. Average depth I can get to in most of Southern California is around 40 feet.
And I did not say anything about color. The nudibranchs I saw down there, that I commonly know as "sea hares" were solid black. The only colorful nudibranchs I have seen in Southern California were small, a few inches and are very rarely seen. It was the size of these nudibranchs I came across that really surprised me. Never seen them that large in all my decades of diving.
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Post by rockpickerforever on Jun 26, 2022 7:28:57 GMT -5
Actually I have seen some small colorful ones diving off of Southern California, but they are very rare. Usually see them more in the Gulf of Mexico.
I have seen several things that are not supposed to be where they were in the ocean. Found a live textile cone snail up in Oregon when I was younger. Not waters they are supposed to be found in as they are generally warm water. Seen oceanic white tip sharks diving off of Southern California, which are not supposed to be in those waters. I found one species of shark I have never see or heard of before. It was a type of horn shark, but with stripes instead of spots. Was not a zebra horn shark though. Every once in a while currents change from North to South to South to North bringing life to Southern California not normally found there. For instance, there was one year when this happened and there was jumbo squid normally found in Southern Mexico waters washing up on beaches in Southern California. This one was not colorful either, actually solid black. I still think they are cool looking. I was just surprised by the size. Had never seen nudibranchs so large before.
Speaking of animals found out of place, during the El Nino winter of 2o15-2016, some Pacific seahorses were found off of Coronado. They are normally found much further south, in warmer water from mid-Baja and south. That same winter a dead venomous Yellow-bellied sea snake was found during a beach cleanup in Huntington Beach. Also not normally found that far north. |
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Post by 1dave on Jun 26, 2022 14:19:25 GMT -5
WHY are Ammonite septa so complex?   The patterns change as they grow from juvenile to adult. I think it is to fit the creature inside.
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