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Relative to most other animal species on Earth, you are closely related to sea urchins and other echinoderms. Chordates (including all vertebrates) and echinoderms (which also includes sand dollars and brittle stars and the like) are both deuterostomes, which means the anus forms prior to the mouth in embryonic development. Most other animals, such as all arthropods, are protostomes, which means the initial invagination becomes the mouth and not the rear end in a top hat. So you share with the sea urchin the decision to prioritize your rear end. Sea urchins are weird. They are really goddamn weird animals and they unsettle me. Especially slate-pencil urchins, they're the creepiest by a long shot. I can't be sexually aroused near a sea urchin, that's how much it affects me to imagine them and their strangeness. Echinometra mathaei ---  Heterocentrotus mammillatus ---  Tripneustes gratilla, the Collector Urchin. ---  Toxopneustes pileolus ---  Astropyga radiata ---  Heterocentrotus spp. ---  Colobocentrotus atrata ---  Eucidaris tribuloides
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Apr 19, 2015 22:38
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they don't seem very creepy to me. I bet I could get a hard on if I was in a tank full of them
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Apr 19, 2015 22:41
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Jimbo Jaggins posted:they don't seem very creepy to me. I bet I could get a hard on if I was in a tank full of them  These crinoids would probably gentle tickle your ball sack
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Apr 19, 2015 22:43
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You sure that last one isn't a Shoggoth?
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Apr 19, 2015 22:47
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 No animal should have a bit inside called an "Aristotle's lantern"
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Apr 19, 2015 22:48
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they were used to make vagina dentata before the industrial revolution
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Apr 19, 2015 22:49
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Stoic Commie posted:they were used to make vagina dentata before the industrial revolution 
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Apr 19, 2015 22:52
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theyre cute
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Apr 19, 2015 22:53
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Jimbo Jaggins posted:theyre cute their mouths: 
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Apr 19, 2015 22:54
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and forums user stoic commie never ate another hush puppy. yikes!
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Apr 19, 2015 22:56
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Stoic Commie posted:and forums user stoic commie never ate another hush puppy. yikes! mouthparts 
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Apr 19, 2015 22:58
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mouthparts of the brittle star, also echinoderm
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Apr 19, 2015 23:02
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Which one is the delicious one?
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Apr 19, 2015 23:14
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None pictured that's why we still have pictures of them to share.
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Apr 19, 2015 23:18
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Going to UrchinCon this year, will post photos when I get back.
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Apr 19, 2015 23:19
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it's fun to catch sea urchins and then it's really tasty to eat their genitals.
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Apr 19, 2015 23:22
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If you have the time and patience and money a large saltwater tank is very fun. Thank you for yet another good science thread OP
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Apr 19, 2015 23:25
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Sea urchin tastes really good. Near where I lived in Italy, people would just fish them right out of the water and smash them open and eat the good parts.
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Apr 19, 2015 23:35
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https://www.youtube.com/watch?v=GsVDVM-3Sa0
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Apr 19, 2015 23:36
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When I was a young boy my family went to Greece a couple of times, which allowed me to build up a healthy hatred of sea urchins that has kept me awake at night and haunted my dreams ever since.
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Apr 19, 2015 23:49
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Business Octopus posted:it's fun to catch sea urchins and then it's really tasty to eat their genitals. no they just kind of taste like seawater
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Apr 19, 2015 23:55
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what do they do if you touch them?
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Apr 19, 2015 23:55
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Jimbo Jaggins posted:what do they do if you touch them? They sting you
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Apr 19, 2015 23:58
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Apr 19, 2015 23:59
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those pictures are loving scary as loving hell and I am glad that the oceans are dying now because gently caress THOSE SEA URCHINS
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Apr 20, 2015 00:01
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Did he say "It's very Roman Polanski, Sigourney Weaver, Alien"? What does that mean?
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Apr 20, 2015 00:03
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Crewmine posted:They sting you Not all, but some are venomous and potentially fatal.
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Apr 20, 2015 00:11
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hey pick do you know anything about carnivorous plants I know they aren't animals but they are close right cause they eat things mostly I am interested in their evolution I guess. I read the wikipedia article on them and it says that they have evolved independently in like 6 different plants. TO me that is pretty crazy like how does that even happen. Honestly it is making me question whether its illogical to say you'd need an intelligent mind to design it. I mean not really, but thats how crazy venus fly traps are to me. I mean pitcher plants aren't that crazy, but venus fly traps what the gently caress???
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Apr 20, 2015 00:13
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SHISHKABOB posted:hey pick do you know anything about carnivorous plants bladderworts are more interesting than venus flytraps, actually
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Apr 20, 2015 00:16
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SHISHKABOB posted:hey pick do you know anything about carnivorous plants There are plants with fast, non-carnivorous reactions also. Mimosa pudica, for example. It is pretty nutty to think a plant used that capability to trap insects, but the most important thing to remember about evolution is that life on Earth has had an absolute shitload of time to figure this stuff out. More than our brains can really contextualize.
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Apr 20, 2015 00:20
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Pick posted:
Where's the butthole we share so much in common with?
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Apr 20, 2015 00:50
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Universe Master posted:Where's the butthole we share so much in common with? It's literally at the top. They eat on the bottom and poo poo out the top.  The bright orange thing is the anus.
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Apr 20, 2015 00:53
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Pick posted:They eat on the bottom and poo poo out the top. Efficient
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Apr 20, 2015 00:54
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Pick posted:There are plants with fast, non-carnivorous reactions also. Mimosa pudica, for example. It is pretty nutty to think a plant used that capability to trap insects, but the most important thing to remember about evolution is that life on Earth has had an absolute shitload of time to figure this stuff out. More than our brains can really contextualize. yeah I know theres a lot of time but how does it just HAPPEN nobody is figuring anything out, its evolution. Theres no one deciding to make changes, these changes happen in the same way a river changes course when it encounters an obstacle.
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Apr 20, 2015 00:56
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SHISHKABOB posted:yeah I know theres a lot of time but how does it just HAPPEN Remember: an evolutionary adaptation doesn't need to be perfect, it just needs to be better than not having it at all. You can bet that in the past, there were less effective, much crummier "flytraps", they just had an advantage over those with absolutely nothing. It's probably easier to imagine for pitcher plants--they probably had a cuplike shape due to other evolutionary pressures, but it happened to be that it had, say, a .1% chance of trapping a fly. Well, those plants do better, and ten million years later their cuplike shape is a little more refined and now they have a 3% chance of trapping a fly. Those are way better off than any remaining otherwise similar trapless plants. Ten million years later, it's a 6% chance of trapping a fly, etc. Flytraps still gently caress up and fail to successfully catch insects most of the time. But it works sometimes, and that's enough to justify it.
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Apr 20, 2015 01:15
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Pick posted:Remember: an evolutionary adaptation doesn't need to be perfect, it just needs to be better than not having it at all. You can bet that in the past, there were less effective, much crummier "flytraps", they just had an advantage over those with absolutely nothing. It's probably easier to imagine for pitcher plants--they probably had a cuplike shape due to other evolutionary pressures, but it happened to be that it had, say, a .1% chance of trapping a fly. Well, those plants do better, and ten million years later their cuplike shape is a little more refined and now they have a 3% chance of trapping a fly. Those are way better off than any remaining otherwise similar trapless plants. Ten million years later, it's a 6% chance of trapping a fly, etc. yes I understand that. What I want to know (and obviously we lack the answer due to incomplete fossil records since these plants don't fossilize well or at all) is how did it start. I mean I know this is that dumb anti-evolution argument basically of "what are the missing links" but I want to know what they are so I can understand what happened. How did a normal plant turn into a venus flytrap, like what were the steps. Or what was the venus fly trap before it was a venus flytrap. there was a time when there were no plants at all, then there were some plants, and now there are carnivorous plants like the venus fly trap. But what was the evolutionary impetus that caused the plant to adapt in that way.
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Apr 20, 2015 01:22
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Thanks for another animal thread, Pick! I always like when you do these.  One thing we can say about you is that you know your animals. Sea urchins kind of make me think of the ancient monsters in Mountains of Madness.
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Apr 20, 2015 01:24
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SHISHKABOB posted:yes I understand that. What I want to know (and obviously we lack the answer due to incomplete fossil records since these plants don't fossilize well or at all) is how did it start. I mean I know this is that dumb anti-evolution argument basically of "what are the missing links" but I want to know what they are so I can understand what happened. How did a normal plant turn into a venus flytrap, like what were the steps. Or what was the venus fly trap before it was a venus flytrap. there was a time when there were no plants at all, then there were some plants, and now there are carnivorous plants like the venus fly trap. But what was the evolutionary impetus that caused the plant to adapt in that way. If I truly knew the answer, I'd probably be famous or some poo poo or at least not live in a craphole. Here's what wikipedia suggests: quote:Proposed evolutionary history
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Apr 20, 2015 01:32
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SHISHKABOB posted:those pictures are loving scary as loving hell and I am glad that the oceans are dying now because gently caress THOSE SEA URCHINS Actually, sea urchins are doing well relative to most other ocean species, since we killed off most of the cod and sea otters.
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Apr 20, 2015 01:46
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Apr 20, 2015 02:48
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