#osteichthyes

[chordata-art]

oarfish

[ppaleoartistgallery]

#Paleostream 7/03/2026

this week's #Paleostream flocking results!!!

today we sketched Megamastax, Ornitholestes, Tanyka, and Eosteus

[ognimdo2002]

Coelacanthus granulatus – First Coelacanth

“ The fish had hollowed out its fins and would soon wish to survive. ”

– Jean Louis Rodolphe Agassiz

Coelacanthus granulatus is the extinct genus and species of coelacanths known from the late Permian period.

References

Coelacanthus - Wikipedia

Coelacanthus granulatus by Ognimdo2002 on DeviantArt

[mobulavermis]

Brook trout / Rainbow trout

[animalids]

Hairy frogfish (Antennarius striatus)

Photo by Mike Bartick

[obscurefossils]

Achanarella

Achanarella was a genus of jawless fish from the Middle Devonian. Its type and only known species is A. trewini. Its known specimens were found in the Achanarras Quarry of Scotland. Despite being known since the 1980s, it was not formally named until 2002.

Its name Achanarella refers to its locality, the Achanarras Quarry. The species name trewini refers to Nigel Trewin, a paleontologist that has done a great amount of work at the quarry for decades.

Achanarella is known from many specimens, though their preservation quality is usually quite poor. The holotype is the best-preserved fossil that has been found to date that has many distinguishable anatomical features. However, the slab the holotype is on has a plant stem crossing through the center, leaving some features unidentifiable.

In life, Achanarella would be a slender and small fish. The largest specimens are about 90mm and the smallest reach about 20mm. The eyes are large and conspicuous, especially with the small head. The mouth appears on the fossils as just a round hole without any obvious features inside. A caudal fin and anal fin are present, and possibly a dorsal fin. There are at least 13, or possibly more than 20, branchial (gill) openings beginning right behind an eye. Achanarella was likely similar looking to a modern lamprey.

Though no notochord is visible, it's likely Achanarella was a vertebrate due to its overall appearance and the presence of epichordal fin supports, a feature many other primitive vertebrates from the time period share. The exact taxonomy of Achanarella beyond that is uncertain, but it was placed into its own family Achanarellidae, which is under Jamoytiiformes.

Sources: Newman 2002

[sonic-elements]

Sonic Elements Species Safari: Fishes part 3

As we swim our last, we enter part 3 and meet family Osteichthyes/Bony fish, all types of fish you can think of is here in these vast waters

Members Include: Remnant The Coelacanth, Lazarus The Lungfish, Reed The Bichir, Scute The Sturgeon, Munch The Moray Eel, Quaff The Gulper Eel, Pyrite The Gold Koi fish, Naw The Piranha, Shocka The Electric Eel, Pond The Catfish, Flopa The Arapaima, Vision The Barreleye, Cleaver The Dragonfish, Adze The Hatchetfish, Cravo The Opah, Paddle The Oarfish, Steed The Seahorse, Algae The Leafy Seadragon, Ketch The Gurnard, Spectrum The Mandarinfish, Avail The Goby, Putty The Mudskipper, Quarrel The Betta, Tappah The Gourami, Jaw The Barracuda, Glu The Remora, Plumb The Flatfish, Sabre The Billfish, Con The Cichlid, Afreet The Angelfish, Shole The Flying Fish, Jaded The Glassfish, Harley The Clownfish, Bumper The Damselfish, Numeral The Gramma, Chatter The Jawfish, Niki The Blenny, Heckler The Sarcastic Fringehead, Nada Steer The Helmfish, Gawk The Stargazer, Mucin The Parrotfish, Swap The Wrasse, Banner The Butterflyfish, Belize The Yellow Tang, Gyre The Moorish Idol, Lyre The Regal Tang, Mola The Sunfish, Reef The Triggerfish, Pop The Pufferfish, Popper The Porcupinefish, Phantasm The Seadevil, Bloat The Frogfish, Gravel The Stonefish, Roar The Lionfish, Glob The Blobfish, Nash The Wolffish, Wrecker The Bass & Itajara The Grouper.

[salmonidae]

california sheephead (semicossyphus pulcher)

one of the largest members of the wrasse family, the california sheephead is a vital part of kelp forest ecosystems. they prey on shelled creatures, which includes sea urchins, who are kelp grazers. their large teeth allow them to crush through the shells of their prey. they are protogynous fish and often travel in a harem - with one dominant male leading a group of females.

this species is listed as vulnerable on the IUCN red list.

gif creds: our planet (2019)