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A guide to how sharks reproduce. #animals #fish #sharks #rays #skates #batoids #ocean #wildlife #marinelife #sealife #nature #sea #education #conservation #animalreproduction (at Nashua, New Hampshire) https://www.instagram.com/p/CqDSBxru2Np/?igshid=NGJjMDIxMWI=
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uncharismatic-fauna · 2 years
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Uncharismatic Fact of the Day
Surprisingly enough, mammals aren't the only animals that provide their young with milk! The giant freshwater stingray is one of several species of cartelaginous, live-bearing fish that sustain their young to term through a form of maternal care called histotrophy, in which the mother provides her embryo(s) with nutritional, milk-like secretions known as trophonemata while they're in the uterus.
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(Image: A giant freshwater stingray (Urogymnus polylepis) caught and released by Cambodian fishermen, by Chhut Chheana)
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manta-ray-space · 9 months
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warning for one clip including animal death :(
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shopcat · 7 months
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there's also a pink manta ray that frequents the same reef as this melanistic one and he's the only one on earth :)
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terrasu · 11 months
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Because I recently (re)discovered my 3D shark glasses
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bmqrczuf4cnqv · 1 year
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taxonomytournament · 4 days
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Taxonomy Tournament: Chordata
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Myxiniformes. This order is known as hagfish, jawless fish which release slime from their skin to protect themselves from predators. They are the only known living species to have a skull but no vertebral column.
Myliobatiformes. This order of batoids includes stingrays and manta rays.
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todropscience · 1 month
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Hello, I have read that the Mantas put 20 eggs but inside this 20 eggs (mermaid pocket) they have 400 more eggs, i don't understand that. Also, i have read that this eggs normally are attach to algas to feed when they are born, but then again i have seen videos of the mantas being born of the inside of the mom. it is because they are different species? please i would love to know that. thank you so much.
When you say mantas, you are talking about manta ray aka devils ray, which are pelagic and travelers batoids, very famous, and seen in snorkel and diving spot in tropical parts of the world. These species do not lay eggs, but rather become pregnant and give birth.
Distant relatives to manta rays are skate (ajidae) and in some cases they lay eggs.
There are big species, who lay big egg cases. such is the big skate (Beringraja binoculata), and particulary, this one is know to lay around (in some cases) 5 to 10 eggs or embryos, inside one single egg case or mermaid pocket.These eggs are fertiliced insided the female, after the copula. Then, the eggs are closed insided the egg case and laying on the seafloor.
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howard, 2017
but in other cases, small skate species, usually coastal, lay a lot of egg cases with a single egg inside, each egg case have tendrils who entangles, and these female lay a lot of egg (or it is likely a group of female laying egg in groups) here is one example of numerous egg cases lay together.
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Hello! What's up with saw fish and saw sharks? Are they related? And what do they use that silly saw nose for?
Sawfish and Saw sharks could be considered cousins of sorts due to them both being chondrichthyans, which means their skeleton is made out of cartilage rather than bone.
Sawfish are actually a type of ray or batoid when saw sharks are considered a true shark. Batoids are more flattish in shape and are usually bottom feeders, they are also sometimes referred to as "flat sharks"
Now what do their saws do? Well, its not too hard to guess that they use their saw-like noses to catch and kill prey along with using them as a tool to dig or a weapon to fight. their saws have small pores that can detect electric fields produced by prey and is shared by both sharks and rays alike. This may also be the reason a lot of sharks come to investigate peoples underwater film equipment or chew the electrical cords that run along the ocean floor, sometimes even cutting off internet.
Sharks are just silly little guys
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eridan-ampora · 6 months
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it's so fucking funny that bat & batoid seem to have... absolutely nothing to do with each other etymologically. these two similar looking but totally unrelated creatures ended up with similar looking but totally unrelated names just by, like, pure coincidence.
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Stingrays of the world. #animals #fish #sharks #rays #skates #batoids #ocean #wildlife #marinelife #sealife #nature #sea #education #conservation #stingrays (at Nashua, New Hampshire) https://www.instagram.com/p/CqIk03Puy4R/?igshid=NGJjMDIxMWI=
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aroace-polyshow · 5 days
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batoids! those are stingrays, skates, etc. theyre related to sharks which i find fascinating, because you wouldnt think that bc of the social view on sharks being big and scary, but u also have to step back from that scary fantasy and realize more things kill u than sharks, and that their are sharks like nurse sharks who are bottom feeders, basically stingrays at that point.
oooooooo!!! stingrays are neat i like them :3 and yeah you’re right!! i think it’s a shame they’ve gotten such a bad rep
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quillusquillus · 1 year
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stop romanticizing batoid nostril body horror 2023 AKA STOP PUTTING EYEBALLS IN THEM DAMNIT
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transgenderer · 11 months
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One of those features is the male claspers in sharks, skates, rays, and chimaeras. The genes known as Hand2, the androgen receptor (AR), and Hoxa13 all have high levels of activity in the pelvic fins of male sharks and rays immediately prior to development of claspers, which begin developing as offshoots of the pelvic fins and are unique to cartilaginous fish. None of these genes are active in female pelvic fins, indicating that their activity is specific to clasper development. But all of these genes are actually highly active in cephalic lobes! This indicates that in addition to modifying the pelvic fins into claspers, these genes also modify the front of the pectoral fins in cownose rays. “We were not able to confirm whether the activity of these genes is specific to cephalic lobes (which would make them ‘cownose ray/manta ray/eagle ray-specific’) or whether it is associated with anterior expansion of the pectoral fins (which would make them ‘batoid-specific’),” explained Swenson.
the cephalic lobes (the weird flaps manta rays have) seem to be genetically related to the claspers used in mating!
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buggybestfriend · 10 months
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15 + 4 + 7
4. mythical creature you think/believe is real?
idk if it counts but like angels ig ? bc y'know. <- is friends with an angel and also satan who like used to be an angel
7. what animal do you look forward to seeing when you visit an aquarium?
all of them !!! but if i had 2 pick then the batoids !! (like the rays + stuff)
15. rank the methods of death: freezing, burning, drowning
best to worst is freezing then drowning then burning
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taxonomytournament · 1 month
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Taxonomy Tournament: Cartilaginous Fish
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Myliobatiformes. This order of batoids includes stingrays and manta rays.
Rhinopristiformes. This order includes shovelnose rays and sawfish
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