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Katie O'Reilly

@drkatfish

Aquatic Invasive Species with Illinois-Indiana Sea Grant | #GreatLakes | Come for the #ecology & #scicomm, get reeled in by the fish puns https://iiseagrant.org/about/our-team/katie-oreilly/

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Latest posts by Katie O'Reilly @drkatfish

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Thru 4/3 you can join our partners at the @ijcsharedwaters.bsky.social for a series of webinars, or submit comments online to share your perspectives on how the Canadian and US governments are doing to restore, protect and enhance #GreatLakes water quality: glperspectives.ijc.org/en

10.03.2026 16:01 πŸ‘ 4 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
Largescale sucker.

Largescale sucker.

Largescale sucker being released.

Largescale sucker being released.

Largescale sucker in net.

Largescale sucker in net.

Largescale life.

07.03.2026 04:13 πŸ‘ 30 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

#HerpInTheGrass Tiny Snapper Edition

10.03.2026 03:32 πŸ‘ 182 πŸ” 15 πŸ’¬ 10 πŸ“Œ 2
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The gaudiest in all of Coral City comes in for a close up: the supermale clown wrasse 🀑🐟 #clownwrasse #wrasse #gaudy #hypercolor #coralcitycamera

10.03.2026 15:15 πŸ‘ 328 πŸ” 56 πŸ’¬ 2 πŸ“Œ 6
Ink sketch of a fish

Ink sketch of a fish

A young of the year Lake Sturgeon, all covered in spiny scutes. #SundayFishSketch

09.03.2026 01:45 πŸ‘ 44 πŸ” 8 πŸ’¬ 1 πŸ“Œ 0
A hand-drawn digital painting by the artist Dhiyanah Hassan of three garden eels on the ocean floor. The one in thr foreground is painted in more detail, sticking out from the sand and slightly bending its head towards streams of light depicted in a soft lilac tone, part of the dynamic shading of the piece. The other two are in the background, facing the opposite direction but similarly looking up at the light rays. The background is a mix of textured and blurry, wuth some grains of sand highlighted.

A hand-drawn digital painting by the artist Dhiyanah Hassan of three garden eels on the ocean floor. The one in thr foreground is painted in more detail, sticking out from the sand and slightly bending its head towards streams of light depicted in a soft lilac tone, part of the dynamic shading of the piece. The other two are in the background, facing the opposite direction but similarly looking up at the light rays. The background is a mix of textured and blurry, wuth some grains of sand highlighted.

Revisiting a fave, experimenting with different brushes and gestures for this study of Spotted Garden Eels #SundayFishSketch 🐑
#art #SciArt #fish #fishArt #wildlife #wildlifeArt #nature #artists

09.03.2026 00:47 πŸ‘ 142 πŸ” 21 πŸ’¬ 0 πŸ“Œ 1
Barred Hamlet fish in graphite and colored pencil; yellow, blue, tan

Barred Hamlet fish in graphite and colored pencil; yellow, blue, tan

Barred Hamlet, Hypoplectrus puella #SundayFishSketch #fish #fishart #Hamlet

08.03.2026 18:42 πŸ‘ 11 πŸ” 6 πŸ’¬ 0 πŸ“Œ 0
Colored pencil drawing of four long and skinny fish poking their heads out of a den in some rocks like Diglets. They’re black with a horizontal white stripe and white belly.

Colored pencil drawing of four long and skinny fish poking their heads out of a den in some rocks like Diglets. They’re black with a horizontal white stripe and white belly.

Quick #SundayFishSketch while I move some data around of convict blennies, who are apparently probably not the sister group to cichlids after all 🫒

08.03.2026 19:10 πŸ‘ 19 πŸ” 6 πŸ’¬ 0 πŸ“Œ 0
Horizontal photo of a crayon sketch of an anchovy with mouth closed

Horizontal photo of a crayon sketch of an anchovy with mouth closed

I enjoyed some anchois frais marinΓ©s today at my friends' restaurant, so here's Engraulis encrasicolus / European anchovy for #SundayFishSketch today. Bon appΓ©tit! (And always a fun reminder that anchovies look like real-life Muppets with their big eyes and exaggerated mouths!) πŸ¦‘πŸ‘πŸ§ͺ

08.03.2026 15:11 πŸ‘ 26 πŸ” 9 πŸ’¬ 0 πŸ“Œ 0
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Eyes on the weekend like πŸ‘€β 
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Rattails, or macrourids, are common throughout the world’s ocean. Those big blue eyes give the rattail an edge at finding food in deep, dark waters, and their keen eyesight reveals prey like fishes and squid darting just above the seafloor. ⁠

07.03.2026 00:17 πŸ‘ 118 πŸ” 27 πŸ’¬ 3 πŸ“Œ 2
A teacher stands on a research boat with a view of the Milwaukee shoreline

A teacher stands on a research boat with a view of the Milwaukee shoreline

Educators, apply for this FREE opportunity to learn about the #GreatLakes and coastal engineering this summer in Milwaukee! Work with engineers, scientists, and educators to explore coastal engineering education and get ideas for lesson plans to teach your students.

https://go.wisc.edu/6qoud7

06.03.2026 17:01 πŸ‘ 3 πŸ” 3 πŸ’¬ 0 πŸ“Œ 1
A bumper sticker that reads, "I'm just a shrimp and life is a nightmare"

A bumper sticker that reads, "I'm just a shrimp and life is a nightmare"

By Shrimple Plan

06.03.2026 17:59 πŸ‘ 14 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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The Nature Record Now it’s our turn to shape what comes next. A new project. A mission years in the making.

The DRAFT Nature Record national assessment has dropped and is ready for comment! I'm proud to be one of the authors. This is the first comprehensive, independent, evidence-based assessment of how nature is doing across the U.S.
Come read. Come comment. Come shape the record.
naturerecord.org

05.03.2026 22:24 πŸ‘ 9 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0
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For the Fun of the Surf In northwest Indiana, there’s a 20-mile stretch of Lake Michigan that’s dominated by industry. It’s some of the dirtiest water in the lake, but it's also home to some of the biggest waves anywhere on ...

Southern Lake Michigan can have some of the best surfing conditions of the #GreatLakes, but the highly-industrial south shore also has some of the most polluted waters. The Chicago Surfrider chapter is trying to keep companies accountable www.interlochenpublicradio.org/podcast/poin...

05.03.2026 16:55 πŸ‘ 17 πŸ” 6 πŸ’¬ 0 πŸ“Œ 0
An illustration of a living shoreline with marsh grasses behind a rock sill along the water's edge. A great blue heron and a turtle perch on separate rocks

An illustration of a living shoreline with marsh grasses behind a rock sill along the water's edge. A great blue heron and a turtle perch on separate rocks

Love using art to depict science? 🎨 Apply for our science illustration internship! We're looking for a student or recent grad who wants to sharpen their skills and work with scientists to translate coastal and marine science into visual art. Apply by March 30: https://loom.ly/3y33wCY

05.03.2026 08:05 πŸ‘ 3 πŸ” 3 πŸ’¬ 0 πŸ“Œ 1
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Been wanting to write this one for awhile!

Conservation obsesses over rare species. But what about the common ones?

Bluegill are the fish almost everyone knows & caught as a child. But, how much do we REALLY know?

New long-form essay πŸ‘‡ 🎣 #InDefeseOfPanfish tnature.substack.com/p/behold-the...

03.03.2026 19:57 πŸ‘ 34 πŸ” 11 πŸ’¬ 2 πŸ“Œ 0

When someone says β€žScientists do not want you to knowβ€œ you can dismiss everything from there on. Scientists want you to know. They are desperate that you know. They can’t shut up about what they found out and want you to know.

03.03.2026 12:10 πŸ‘ 9513 πŸ” 4128 πŸ’¬ 77 πŸ“Œ 165
Several people stand and sit around a dock on a lake, learning about aquatic plant specimens.

Several people stand and sit around a dock on a lake, learning about aquatic plant specimens.

Explore the rarely seen world of freshwater plants! We're teaching a 2-day lab and classroom course in Aquatic Plant Identification at Kellogg Biological Station, June 17-18. Join us!

www.canr.msu.edu/news/explore...

#MacrophyteMonday

02.03.2026 21:40 πŸ‘ 4 πŸ” 2 πŸ’¬ 0 πŸ“Œ 1

"As much as 83% of a wolf's calories in summer months comes from eating berries."

TIL I'm actually a wolf

02.03.2026 21:40 πŸ‘ 21 πŸ” 7 πŸ’¬ 1 πŸ“Œ 0
Ink sketch of a large, torpedo shaped fish with a duck billed shaped mouth swimming under the ice with a fishing line dangling down.

Ink sketch of a large, torpedo shaped fish with a duck billed shaped mouth swimming under the ice with a fishing line dangling down.

Lurking below the ice, it is the Northern Pike! #SundayFishSketch

02.03.2026 02:31 πŸ‘ 30 πŸ” 6 πŸ’¬ 0 πŸ“Œ 0
Photo of a crayon sketch of a Roa modesta butterfly fish

Photo of a crayon sketch of a Roa modesta butterfly fish

Taiwan is home to some incredible butterfly biodiversity, and I happened to see a gorgeous swallowtail today. Hence the inspiration for this #SundayFishSketch of Roa modesta 樸蝴蝢魚 (Chaetodon modestus) butterflyfish tonight. #TaiwanFishes #台灣魚鑞 πŸ‘πŸ¦‘πŸ§ͺ

01.03.2026 16:20 πŸ‘ 22 πŸ” 6 πŸ’¬ 1 πŸ“Œ 0
Photo of a sketchbook page with six sketches: a sillago, a tube shoulder, a larval mahi mahi, a greenling, a jack, and a butterfly fish

Photo of a sketchbook page with six sketches: a sillago, a tube shoulder, a larval mahi mahi, a greenling, a jack, and a butterfly fish

#SundayFishSketch BONUS: Another page full in this latest sketchbook! πŸ‘πŸ¦‘πŸ§ͺ

01.03.2026 16:26 πŸ‘ 27 πŸ” 5 πŸ’¬ 0 πŸ“Œ 0
Spotted Trunkfish in watercolor

Spotted Trunkfish in watercolor

#SundayFishSketch Spotted Trunkfish, Lactophrys bicaudalis

#dothe100daysproject #the100dayproject #fish #fishsketch #fishart #coralreef #spottedtrunkfish #swimminghandbag

01.03.2026 16:36 πŸ‘ 18 πŸ” 4 πŸ’¬ 3 πŸ“Œ 0
Ink sketch of some of the fish that can be let through with the Vishdeurbel. Shown are Bleak, Eel, Common roach, Perch, White bream, and Pike-perch.

Ink sketch of some of the fish that can be let through with the Vishdeurbel. Shown are Bleak, Eel, Common roach, Perch, White bream, and Pike-perch.

Since it’s back tomorrow, #SundayFishSketch this week is some of the fish you can answer the Vishdeurbel for πŸ›ŽοΈπŸ›ŽοΈ they all look very polite

01.03.2026 16:51 πŸ‘ 14 πŸ” 6 πŸ’¬ 0 πŸ“Œ 1
A watercolor painting of a yellow fish facing to the left on a blue background. The fish has black spots and a sort of square-round shape

A watercolor painting of a yellow fish facing to the left on a blue background. The fish has black spots and a sort of square-round shape

My #SundayFishSketch this week is a yellow boxfish, one of my favorite to paint because of their fun shape! Always good to practice depth with watercolors!

01.03.2026 21:42 πŸ‘ 27 πŸ” 7 πŸ’¬ 0 πŸ“Œ 0

Deep sea ecologist here. He's not wrong.

28.02.2026 20:45 πŸ‘ 89 πŸ” 13 πŸ’¬ 1 πŸ“Œ 0
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Timeline cleanse Central Park coyotes howling along to sirens

27.02.2026 02:55 πŸ‘ 1979 πŸ” 554 πŸ’¬ 25 πŸ“Œ 62
Worksheet titled: "Evolving from Eel-less Language" and it includes a column titled "Instead of" with a red X, and a column titled "Say this" with a green checkmark. The "Instead of" column includes sayings like "You're doing it wrong" and "Look at those used condoms in the water!" The "Say this" column includes sayings like, "You're grabbing an eel by the tail" and "Hey! Manhattan eels!"

I don't have the space here to list all of them. But each expression in the "Say this" column is a bonafide (read that in a Wharvey Gal's accent) historical eel metaphor. We'd all be better off if we talked more about eels.

Worksheet titled: "Evolving from Eel-less Language" and it includes a column titled "Instead of" with a red X, and a column titled "Say this" with a green checkmark. The "Instead of" column includes sayings like "You're doing it wrong" and "Look at those used condoms in the water!" The "Say this" column includes sayings like, "You're grabbing an eel by the tail" and "Hey! Manhattan eels!" I don't have the space here to list all of them. But each expression in the "Say this" column is a bonafide (read that in a Wharvey Gal's accent) historical eel metaphor. We'd all be better off if we talked more about eels.

We're all trying to be careful with our language, so as not to offend, or not to lose federal funding for talking about paragraph transitions.

To help you out, here's a worksheet to guide you in swapping out troublesome phrases for real, historical eel expressions.
πŸ—ƒοΈπŸ§ͺ

27.02.2026 15:12 πŸ‘ 324 πŸ” 101 πŸ’¬ 7 πŸ“Œ 6
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Yesterday's waves hitting the south pier of Manitowoc. Lighthouse visible. #GreatLakes

25.02.2026 15:41 πŸ‘ 22 πŸ” 1 πŸ’¬ 2 πŸ“Œ 0

Bringing back some of the #GLANSIS team's greatest for #NationalInvasiveSpeciesAwarenessWeek: here's some great coverage of last year's landmark paper on the top 10 most impactful #GreatLakes #AIS!
#NISAW

24.02.2026 18:22 πŸ‘ 7 πŸ” 6 πŸ’¬ 0 πŸ“Œ 1