#Freshwater fish

[bornulhuu]

Big scary freshwater fish

[tangypotato]

Week 1 update on my 10 gallon betta tank

I got a better light because my previous one was kinda crappy and I added some red root floaters

I added shrimp from my other tank to eat some algae and melting plants (mostly the crypt)

I also plan to add kuhli loaches because they have are cute and I finally have a tank big enough to house them

That’s it for this update see you next time

[fishenjoyer1]

Fish of the Day

Today's fish of the day is the California sheephead!

The California sheephead, as some of you who have been here since the early days will know, happens to be the first ever fish I wrote about for fish of the day back in January 2022! Known by the scientific name Bodianus pulcher, (formerly Semicossyphus), this fish is a species of wrasse in the Pacific. Found along the coast of California and Mexico, stretching from Monterey Bay California to the Gulf of California. They live along the kelp forests common in this area. Although, there are populations living along rocky reefs and sandy seabed areas. The fish are highly territorial over their home, and only settle in a very small refuge area, which they protect. These areas and the cycle of migration with the California sheephead are shaped almost entirely by light levels, as they travel between a refuge area and a foraging area throughout the day, and then when spawning these fish travel to a breeding area. This is why some issues have arisen due to overspilling light pollution by humans.

Their diet consists primarily of sea urchins, although they also prey on crustaceans, mollusks, and other fish. Their role in the ecosystem of kelp forests can not be understated, which is why the overfishing of them by humans is such a problem. This is because the overabundance of urchin in an area can decimate entire kelp forests at a rate of 30 feet a month in herds. Their diet of urchins allows these fish to get as large as 3 ft in length. Despite their large size, these fish are regularly predated on, primarily by sharks in the area. The California sheephead can warn other fish in the area of their plight however, damage released chemical cues come forth once the skin is ruptured, informing other fish in the area. These chemical cues are not always perfect however, as fish infested with parasites reduces reliability of these cues.

California sheephead, as like many wrasse, are born female and can morph into functional males throughout their lifespan, called Protogynous sex change. This change is moderated by a steroid hormone, and is undertaken by the largest and best fed individuals in an area. Sheephead are hermic spawners, and males have a group of females of which they protect and breed with. When the male for a group of females passes away, the largest female will morph into a male form and take the role. This can take anywhere between 2 weeks or several months. The mating season for these fish is between June and September, and the male will lead all his females in a circular pattern, releasing eggs and sperm. Females during this time can release as many as 130,000 to 375,000 eggs in a day, which will hatch into planktonic larvae. They will continue life as larvae for  34 to 78 days, before settling in a shallow reef and growing as normal. By the time they reach an age of 4 and a size of 10 inches, the fish are ready to spawn, although this is variable between populations. These fish can live upwards for 20 years in the wild, and as long as 50 in captivity, living through tens of breeding seasons, and producing hundreds of children.

That's the California sheephead everyone! Have a wonderful day

[foxsnails]

Drawing rainbow trout in my diary <3

[troutpaws]

fishtober day 06:

alabama sturgeon (scaphirhynchus suttkusi)

[legendaryorca]

a few days ago, I have found gunshot fish (it would be funny if gunshot fish was its common name since it doesn’t have one yet)

(it says I visit often)

this fish 1.2 cm in length can make 140 dB sounds (by striking its own swim bladder with its rib, if I understood correctly)

but due to how sound works and also how water affects sound it would be less louder from a distance

but still loud

they say specialized ribs and muscles allow the fish to not instantly die when it makes the sound, but I haven’t found much detailed explanation on how exactly they help the fish not shock itself to death with the sound

pistol shrimps have these funny organs called orbital hoods that serve as helmets to protect themselves from their own shockwaves made when they snap their claws, preventing brain damage. but I don’t see any possible organs in this fish that could shield itself from its own noise.

maybe it’s unnecessary because the pistol shrimp’s noise is much louder than D. cerebrum’s, at 210 dB but I still think 140 dB is still dangerous enough for a fish smaller than a penny (also this fish is smaller than most pistol shrimps)

yeah

[aticketplz]

かわいすぎないか？

Isn't she too cute?

息してる！

She's breathing by her mouth and lungs!

いきなり回り出した！

She suddenly started to spin!

かわいすぎて私の肺とまった

She was so pretty my lungs forgot to breathe.

鳥羽水族館

Toba Aquarium

[catnoli]

carrd | faq | ko-fi | shop

sturgeon and paddlefish for a commission!!

[blessedscavengers]

part four of my Mississippi River fish series

made in 2024

[skovoxblitzer]

Pictures I took of sturgeon on a road trip!! There was also a sturgeon touch tank SO I GOT TO TOUCH A STURGEON but alas I didn’t get pictures

[possumnest]

six HOT New FISH STICKERS !!

on my etsy store now!

my sticker aquarium now includes the red asian arowana, brown bullhead, coelacanth, largemouth bass, lake sturgeon, & zombified sockeye salmon!

want all of them for a discounted price? you can get either all of these new guys + two older fish designs (rainbow trout and sauger) in a bundle or just the freshwater fishies in a bundle! don't miss this big catch!!!¡!🐟

[theyshapedlikefriends]

AMUSE - 20cm Goldfish

[ronthafrog]

the variation within one species of fish is quite amazing- here are two banded darters from the same location & time

[fishenjoyer1]

Fish of the Day

Today's fish of the day is the Alabama Cavefish!

The Alabama Cavefish, scientific name Speoplatyrhinus poulsoni, is known for being one of the rarest troglobitic fish species in North America. Discovered in 1967, by the time the alabama cavefish was scientifically described in 1974, there were only about 100 fish left. On any visit to the cave, only about 10 fish have ever been seen, but they are consistently different fish, so the estimated number is a little under 100, making them critically endangered. This also makes them a possibility for the rarest cavefish in North America!

Despite the large waterways connecting caves in Key Cave National park to several other cave systems, the Alabama cavefish has restricted itself to only one cave for reasons we don't understand. A search of over 120 caves in the surrounding area revealed no populations or signs of populations. With a range consisting only of Key cave in Lauderdale county, Alabama; these fish are constantly faced by the threat of extinction, and most of their worries are based on the limited home range, and waters entering the cave. Any water with chemicals, especially fertilizers and other agricultural runoff are a large concern. That along with competition from more aggressive cavefish, and predation from nearby crawfish. Due to their living situation and delicate population, much is unknown about these fish. But, let us go over what we do know!

The diet of the Alabama cavefish consists mostly of invertebrates found in the caves: copepods, isopods, smaller cavefish, spiders, beetles, and anything else it can find that will fit in its mouth. They grow up to a size of 2-3 inches in length. They have no eyes or pigment, and hunt solely based off of sensory protrusions that dot the head and sides, a trait evolved to handle the almost complete darkness. These fish have no breeding season, and instead breed based off of the environmental signal: when the caves flood in the winter and spring. Insufficient flooding can lead to years where no breeding or spawning occurs, and when it does females carry few eggs, and even fewer eggs hatch. Their lifespans, based off of the lifespan of Northern cavefish, are an estimated 5-10 years.

[anabantoid]

Noses :)

[troutpaws]

sketchbook painting of a little cherry salmon (oncorhynchus masou)

acrylic & digital 2023