marinus 🪸 @marinmers - Tumblr Blog

this would be more fitting to post on their birthday, but I’m not waiting that long

how many sturgeon species are there?

There are 28 extant species of sturgeon, organized into 4 genera: Acipenser, Huso, Scaphirhynchus, and Pseudoscaphirhynchus.

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Genus Acipenser contains the fish that come to most people’s minds when thinking of sturgeon: lake sturgeon, Atlantic sturgeon, white sturgeon, European sea sturgeon, etc. This is the largest genus of the family Acipenseridae, containing 20 species of sturgeon. Sturgeon in this family can be found in North America, Europe, and Asia.

(Atlantic sturgeon, A. oxyrynchus)

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Genus Huso has only two members: beluga and kaluga. They are native to Russia and the surrounding parts of Eurasia. There is some argument that these fish should be included in the genus Acipenser. Unlike the members of genus Acipenser, whose protrusible mouths face downward, sturgeons in genus Huso have forward-facing protrusible mouths.

(Kaluga, H. dauricus)

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Genus Scaphirhynchus contains three species of fish: shovelnose sturgeon, pallid sturgeon, and Alabama sturgeon. Scaphirhynchus means “spade snout”, in reference to these sturgeons’ long, flat, shovel-like snouts used to dig along river beds for food. This genus of sturgeon is native exclusively to the Missouri, Mississippi, and Alabama rivers in North America.

(Pallid sturgeon, S. albus)

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Genus Pseudoscaphirhynchus is native exclusively to the Aral Sea system in Central Asia. This genus has three members as well: the Amu Darya sturgeon, the dwarf sturgeon, and the Syr Darya sturgeon. Like genus Scaphirhynchus, these fish have shovel-like snouts. Sturgeon in this genus are very small compared to sturgeon in other genus; the largest Pseudoscaphirhynchus sturgeon reach about 30”, excluding tail filament.

(Amu Darya sturgeon, P. kaufmanni)

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Most species of sturgeon are endangered in some capacity. Many of the sturgeon mentioned in this post are critically endangered, with no individuals being spotted in the wild for many years.

It breaks my heart to think that we are slowly losing more and more species of these beautiful fish. But interest in their well-being is the first step to conservation, and that’s what I hope to cultivate here at sturgeonposting. Sorry to get all sappy at the end. I just love these guys. Long may the sturgeon swim.

#:(#marine bio

sylviii

"come home and see my girl cave :)" I say flirtily. You agree, imagining a rec room with some couches and maybe a few vintage consoles. I lead you down into the basement, where I have carved out a slimy grotto with its own ecosystem. by the time you see me dive into the water and come up with a fish in my teeth, it's too late. You want to fuck me so badly.

zegalba

The Alabaster Nudibranch is a soft-bodied marine mollusc indigenous to the Eastern Pacific Ocean.

#marine bio

louis-damien

Hearing them get so excited over the whale fall is so fun I love hearing people who are passionate about their work

chibikittens

one scientist, “worms.”

every other scientist in sync, “worms!!”

somethingusefulfromflorida

#marine bio #even as a riverbeast this shit makes my brain go !!!!!!!!!!!!!!!!

morbidology

A clam with pearls inside.

bogleech

Haha, notes are so disturbed to learn that pearls form inside the tissues and not just lying inside.

So how do y'all feel about the fact that pearls have nothing to do with sand? Bivalves deal with sand all day long, of course grains don’t get “stuck” until they have to make a pearl. That was the assumption centuries ago and just continues to be spread by the jewelry industry as a plain old lie.

The formation of a pearl is to smother and permanently seal the parasites bivalves contract from all the animal feces they process :)

https://cortezpearl.mx/pages/how-a-natural-pearl-is-born-from-myth-to-reality

(which to me is very cool and if it grosses you out you should reconsider because biologically speaking it’s the equivalent of a trapped evil spirit)

#marine bio

c0rpseductor

cuttlefish have three hearts because they love you so much

c0rpseductor

he loves you

#marine bio

its-just-fern

it’s the

day of love

#yeah.#fern tag #finn tag

dykecadence

every moment of every day i am thinking about this tiktok

purrfectly

Lumpfish come in a variety of shapes and colors.

[He scoops up the fish, it spits water and he turns it toward the camera]

This one is stumpy and green. Very beautiful, very powerful.

[He picks up another fish and turns it toward the camera]

This is what a normal lumpfish looks like. It is more elongated, but still a vibrant blue color. Very beautiful, very powerful.

[He picks up another fish and turns it toward the camera]

This is one of the stumpiest ones we have. Its hump is very high. It is very stumpy, but yet very beautiful, and very powerful.

[He pans over a lot of fish, all looking up at the camera]

My fish army is ever growing, and soon I will over throw the world. Very beautiful, very powerful.

saint-batrick

because of this tiktok, i frequently murmur "very beautiful, very powerful" at myself, and i cannot recommend it enough.

Love sharks sm

#asking the important questions #marine bio

fairycosmos

instead of killing myself i will watch documentary about the ocean

fairycosmos

some big guys down there. Huge. they don't know about the economy

dinzeeyz

More information on how to donate and get your requests drawn here!

reasonsforhope

Giving local communities the right to manage the giant arapaima fish has saved one of the largest river monsters.

“When the Brazilian state of Amazonas put the responsibility of protecting one of the world’s largest freshwater fish in the hands of the indigenous inhabitants, it saved the beast from an inevitable extinction.

The giant arapaima, a piranha-proof river monster capable of growing to 10-feet in length and weighing 440 pounds, was almost wiped out by illegal fishing in the 1990s, but two decades of conservation means the ‘Terminator of the River’ is back…

Regardless of their danger, they are also known by the name ‘Cod of the Amazon’, and disregarding a ban on arapaima fishing, their numbers have been plummeting due to the demand for the firm white meat with few bones.

The arapaima disappeared from much of its historic range, and at the dawn of the new millennium, fewer than 3,000 were estimated to exist.

Taking a different model to most conservation methods in the Amazon, João Campos-Silva, an ecologist at the Institutio Juruá, decided to work with local communities to preserve arapaima fishing, and to help people realize the kind of money they could make by protecting the environment.

“Conservation should mean a better life for locals,” Campos-Silva told CNN. “So in this case conservation started to make sense. Now local people say ‘we need to protect the environment, we need to protect nature, because more biodiversity means a better life…‘”

According to Campos-Silva, there are now 330,000 arapaima living in 1,358 lakes in 35 managed areas, with over 400 communities involved in managing them. The income generated from fishing rights is pouring into those communities, who are using it to fund medical infrastructure, schools, and more.” -via Good News Network, 10/26/21

#marine bio