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salmonarium · 2 years
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A submission from prompt 3!
brought to you by Julian (Scurb#1991)
i spent quite a bit thinking, but lets talk about the bobbit worm! or at least that seems to be their most popular nickname (since the actual name is the eunice aphroditois which sounds cooler to me but to each their own i suppose)... these guys often get the reputation for being scary or like intimidating but im here to talk about how impressive they are and that theyre just rlly sweet and adorable💜
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these almost ancient ~1-3 meter worms (making them the stretchiest or tallest members of the polychaete class) have a strangely entrancing body, being layered all throughout in a glistening exoskeleton which is fully exposed, they are nocturnal predators who hunt by hiding in broken tiny pieces of natural quartz, or tightly interconnected coral reef, usually preferring the former due to their nature of sticking to the ground (though they still stick close to corals, since their prey are also usually found there)... they mostly appear in the atlantic ocean but due to their sheer frequency have been found in environments similar to that of the natural conditions present in the atlantic... going along the body, it almost appears as if these worms have legs, which is naturally impossible since all worms distinctly lack vertebral column let alone a bone structure (they are invertebrates after all), so instead the navigate the ocean floors (tho they dont tend to go deeper than around ~100 meters) by bristles, which are useful for movement, and also digging the places they like to hide in for the majority of their time until there is a prime opportunity to attempt to hunt a particular prey, bristles are usually really rough, and extremely stiff hair which they can in this case manipulate to simulate walking in a sort of realistic sense (they personally remind me of cilia though idk if anyone else see it that way)... the more interesting bit about this part of the body is that they actually reproduce in a very old way that animals used to more often (which is logical since research suggest these animals havent changed much in over ~400 million years or at least 20 by reliable reports), when they sexually mature, they use features of external fertilization (like most of their funky friends over at the polychaete class, which is usually a method wherein a sperm cell and egg join outside of the body, being released from the bodies of their parents), but they also use elements of asexual reproduction by cutting off the lower segment of their body and letting them float up towards the surface, after which those parts turn into genetical copies of their parents, though they also interact with their fellow segmented counterparts, making them a weird sexual-asexual hybrid, though id watch this bit, as research on them and especially their reproduction is scarce, and there are valid scientific forces claiming that they are both fully sexual, or fully asexual, so its partly up to personal interpretation, im tryna give my take by compromising with both sides (this detail and the next is what makes them super WOW tho imo)... now going to the top of the body you can easily spot the most distinct and beautiful features of this wonky worm, the swagalicious dude has a large pair of mandibles, which are highly deadly (uniquely agile) jawbones that are often present in many marine species, just like the goblin shark, this jaw gets externally launched out like a slingshot to increase the speed, strength, and effectiveness of their shot at catching their prey at around 6 meters a second, which isnt as fast as the goblin shark (who holds the world record at one bite per 0.16 seconds)... after they bite their prey (or sometimes cut them in half as have been observed with smaller fish), a secondary serrated jaw called the maxillae actually gloop their prey into their lengthy body... theyre also infamous for getting stuck in aquariums through rocks that come with them (eating the fish in it) but i think theyre lovely and i love these guys a lot!💜
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salmonarium · 2 years
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Bunjy, can you tell us about the Catfish that ate a Nazi? Was that real?
mmm... nope!
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it was totally plausible though, which is why everyone believed it!
various species of giant catfish worldwide ARE known to feed off of human remains or the occasional still-live human if they can catch one, and are ALSO known to live for well over half a century!
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and on top of that, a particularly robust species of giant catfish, the Wels, has a range that happens to overlap with an awfuuul looot of WWII battlefields:
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with all these facts taken together, a giant catfish could conceivably have snacked on a nazi or three at some point during or slightly after the war, but it wasn't the catfish in the story.
which was entirely fake.
sorry!
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salmonarium · 2 years
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🌊🌊 🐚 BENTHIARY 🐚 🌊🌊 day 13-14 Thaumastochelidae is a family of deep sea lobsters, one of them includes the Thaumastocheles zaleucus, the Atlantic deep-sea lobster. They're blind and have an enormous spiky claw that looks like a secondary mouth! I wonder how they balance themselves with such a huge size difference on one end... 🦞 ❤️ 🦞 By the way, I have historically been bad at drawing animals. But here I am trying to draw a lobster for the first time, let alone a side view of it..! This was my third draft of it, reeeally wanted to showcase that huge claw somehow. I wonder what colour they are in the wild, never did figure that out.
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salmonarium · 2 years
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Kaiser’s spotted newt (Neurergus kaiseri)
… also known as the Luristan newt , is a species of very colourful salamanders in the family Salamandridae. It is endemic to the southern Zagros Mountains in Iran. It is primarily found in highland streams surrounded by arid scrubland, but can also be found in ponds and pools. Water is absent from its habitat for a significant part of the year, during which this species is known to estivate.
It is considered critically endangered due to its tiny range (it inhabits an area of less than 10 km2), continuing habitat loss, and the illegal capture of salamanders for the wild animal trade. In 2008, the wild population was estimated at less than 1000 individuals.However, a new survey in 2014 estimates a population of over 9,000 adults, and range estimate that could provide habitat for more than 40,000 N. kaiseri.
(via: Wikipedia)
photograph by Richard Bartlett
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salmonarium · 2 years
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A Striking Salmon Shark
A close cousin to great white sharks and a formidable apex predator, the salmon shark (Lamna ditropis) is common sight in the frigid northern Pacific ocean. It spends most of its time in the open ocean, but it can be spotted off both Asian and North American coasts from the Arctic Circle to as far south as the Sea of Japan. However, it is most frequently seen near the Prince William Sound in the American state of Alaska in the summer, due to the area’s annual salmon run.
As expected from the name, the principle food of the salmon shark is salmon. This is especially true in the summer, when salmon return to their breeding grounds. The influx of prey into bays, coves, and river outlets makes it easy for sharks to gorge themselves on the excess population. Over the rest of the year, the salmon shark’s diet broadens to include herring, mackerel, birds, small to medium aquatic mammals, and squid. Despite being an apex predator, the salmon shark does have some predators of its own, mainly great white sharks and blue sharks; however, these mostly only prey on juvenile salmon sharks.
Like many other shark species, salmon sharks are largely solitary. One unique feature of this species is that the sexes are divided; eastern populations are largely female, while western populations are mainly male. Reproduction occurs in the late summer or early autumn, which coincides with the annual salmon run on the eastern Pacific coast. L. ditropis is ovovivparous, meaning its eggs develop inside the mother and young are born live in litters of two to six pups. Gestation takes about nine months and females only mate once every two years. Individuals can become sexually mature at anywhere from five to nine years old, and in total they can live up to 25 years.
Although they are closely to and resemble great white sharks in many aspects, there are some key differences between great whites and salmon sharks. For one, L. ditropis is much smaller; only 2-2.6m long and 220kg. Males tend to be slightly smaller than females. Salmon sharks are also slightly darker than great whites, with dark grey or black backs and a white underbelly. Another distinguishing feature for salmon sharks is their ability to thermoregulate. Most fishes cannot maintain an internal temperature, which is why it’s so important that they stay in water within their tolerance range. Salmon sharks are endothermic, meaning they maintain a constant internal temperature. They also have the highest internal body temperature of any shark species at about 18-27° C. In order to maintain this temperature in the cold north Pacific, L. ditropis has arteries and veins that are very close together to exchange heat, cold water from the gills cools blood close to the skin so that little to no heat is lost.
Conservation status: The IUCN lists the salmon shark as Least Concern. The population is currently stable, although it faces threats from fishing as both a source of meat and by catch, as well as loss of food from overfishing of the salmon it relies on in the summer.
Photos
Ron Watkins
Washington Department of Fish and Wildlife
Alaska Department of Fish and Game
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salmonarium · 2 years
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Class (french) doodle of THE NAUTILUS.
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salmonarium · 2 years
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[ID: A painting of an underwater ruin of technical remains, sharp pieces and ends protruding, Two coelacanths are swimming in front of a structure in the middle, and behind a colossal squid, bigger than they normally get, is swimming towards the background. /end ID]
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salmonarium · 2 years
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[ DoctorKnits Lobster Sweater  // via WeHeartIt ]
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salmonarium · 2 years
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I've heard that reptiles can't form bonds with people. Idk if that was something from like, pet stores who didn't know/want to care properly for reptiles or what. Is this true? Or is it something that we didn't use to think could happen, but we know more now? Like how we know more now that fish can have fun or play.
it depends on what you mean by "form bonds!"
if you mean "form a pack/clan bond with you using happy brain chemicals", then no. that's strictly a mammal/bird thing.
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but, if you mean "recognizes you as an individual and a place of safety, tolerates interactions with you that absolutely would not happen in the wild and even initiates those interactions with you voluntarily" then congrats! fish, frogs, and reptiles absolutely CAN do that!
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both of these types of bonding are extremely meaningful to their respective animals and one isn't inherently better than the other, just make sure you adjust your expectations to fit your pet.
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salmonarium · 2 years
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no lobsters are NOT monogamous, yes lobsters probably DO feel pain. Where do all these weird lobster rumors come from.
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salmonarium · 2 years
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Thoughts on lobsters? I really like them, especially Norwegian, squat, and reef lobsters (:
Lobsters are some really funky creatures, I love them.  
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^ Enoplometopus or Reef Lobster
1. As far as we know, lobsters don't stop growing. They don't live forever, like some people say, but they never stop growing! (Although under the right circumstances, they can live for a long time- the oldest known lobster was 140 years old!) 
2. They will eat each other. This is actually a reason why lobster farms aren't really a thing- the enclosed lobsters will literally eat each other.
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^ Nephrops norvegicus or Norwegian Lobster
3. Lobsters have a gastric mill, which is sort of like teeth in the stomach. This is how lobsters and many other invertebrates chew their food. The teeth-like fixtures grind it up in the stomach.
4. They do have some regenerative powers. It takes a while, usually up to a few years, but they can regrow claws.
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^ Scyllaridae or Slipper Lobsters (my favorite family of lobsters) 
5. Lobsters have a dominant claw, kinda like people. They can also be ambidextrous.
6.  Lobster blood is colorless until it’s exposed to oxygen, then it becomes blue! 
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salmonarium · 2 years
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Ceramic Whales
Alexa Verg on Etsy
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salmonarium · 2 years
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Kelp Forest
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salmonarium · 2 years
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No words, just fish!!1
(I don't know why, but i found, that i like fishes, VERY LIKE THEM)
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salmonarium · 2 years
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i luv eels
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salmonarium · 2 years
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Welcome to the official Tumblr blog of The Salmonarium! We are an aquatic biology based discord server! (15+)
What we offer:
- Welcoming and inclusive community
- Biology resources
- Weekly research activities with badges as rewards
- Aquarist channels
- Exclusive channel for boosters
Click here to learn more about the server!
Read more about the badge system here!
https://discord.gg/5eaDw98Eby
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salmonarium · 2 years
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The badge system!
What are badges?
Badges are limited-time collectibles you earn by taking part in server activities, mainly by posting about prompts. Most of them will be limited time so keep an eye out!
At the start of every week a random prompt will be posted in prompt board! You have the whole week to come up with something related to the prompt: an essay(don’t worry about it being fancy at all, it’s supposed to be fun!), a presentation, a video or even an art piece. As long as it’s yours anything goes!!
After you submit your work, you will be rewarded with a badge!
You can expect surprise extra prompts from time to time, independent from the weekly ones! (they come with their own badges!)
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