The Head

Simplify

Yellow pasha butterfly caterpillar, Herona marathus, Apaturinae (Emperors)

Photographed in China by jiangyou

If i had a nickel for every time i fell for a tv headed man with an accent, who believes that hes evil, who accidentally adopts a girl, who wears a hat, who has bar colored teeth, who also has a bowtie…

I’d have two nickels

Which isn’t alot but its super strange its happened twice.

𝓯𝓻𝓮𝓪𝓴𝔂 ass lampreys .. meandwho/j

Source is SHARKEEE ON TWITTER who posts tons of original amazing wildlife shots and videos but I needed to show you what lamprey look like mating, you won’t regret it especially not when one of them is still so worked up it starts swinging a boulder around with its face

I need the rainbow trout truck so bad

Round 2 - Chordata - Actinopterygii

(Sources - 1, 2, 3, 4)

Over 50% of chordate species are Actinopterygians (“Ray-finned Fishes”). There are over 30,000 species, comprised of the Polypteriformes (“Bichirs” and “Reedfish”), Acipenseriformes (“Sturgeons” and “Paddlefish”), Amiiformes (“Bowfins”), Lepisosteiformes (“Gar”), and the Teleosts (about 40 orders containing all rest of the actinopterygians).

Ray-finned Fishes are so called because of their lightly built fins made of skin webbings supported by thin bony spines. Actinopterygians are unique for their swim bladder, an organ that allows them to adjust their buoyancy. They are the most abundant free-swimming aquatic animals and can be found almost anywhere there is water. They come in a vast majority of sizes, shapes, scale-types, fin-arrangements, colors, and behaviors, from the 8 mm (0.3 in) long Paedocypris to the 11 m (36 ft) long Giant Oarfish (Regalecus glesne) to the 2,744 kg (6,049 lb) Giant Sunfish (Mola alexandrini). They have feeding strategies ranging from predatory to grazing to filter-feeding.

In most actinopterygians, males and females exist and reproduce through external fertilization. However, some species utilize sequential hermaphroditism, in which they start life as females and convert to males at some point. In a few species, they start life as males and convert to females. Some species give live birth, and some species self-fertilise. Some abandon their young, while some practice maternal and/or even paternal care.

The earliest known actinopterygian is Andreolepis hedei, from the Late Silurian. The teleosts in particular diversified wildly during the Mesozoic, resulting in the high diversity of shapes we see today. The earliest fossil relatives of modern teleosts, (Prohalecites and Pholidophorus), are from the Triassic period, though it is suspected that teleosts originated already during the Paleozoic Era.

Propaganda under the cut:

Many Actinopterygians, especially those that live in the deep sea, are bioluminescent, glowing in a variety of colors and patterns to attract prey, mates, or even just communicate.

Some species of Puffer Fish (Family Tetrapdontidae) are highly poisonous, second only among vertebrates to the Golden Dart Frog (Phyllobates terribilis).

The most venomous fish is the Reef Stonefish (Synanceia verrucosa). The spines on its back produce a venom which can cause severe pain, shock, paralysis, and tissue death in humans.

Male Seahorses (Genus Hippocampus) are known for having a pouch in which they carry eggs laid by the female.

The Harlequin Tuskfish (Choerodon fasciatus) has electric blue vampire teeth.

Speaking of teeth, Serrasalmids have jaws ranging from human-looking nutcracker teeth to bear-trap looking flesh-eating chompers.

The Mandarinfish (Synchiropus splendidus) and the Picturesque Dragonet (Synchiropus picturatus) are the only two vertebrate species known to produce their own true blue coloring. Blue as a color is usually a result of reflected light, and almost all cells that are perceived as blue are actually a reflective black. However, these two mandarinfish species have cyanophores, which are both blue in pigment and reflective, making them the most blue animals in nature.

Many fish are popular in the pet trade (some more ethical pets than others) and some have even been domesticated and bred to display a variety of colors and shapes, including goldfish, koi, Betta, and zebrafish.

Moray Eels (family Muraenidae) have a hidden set of internal jaws, called pharyngeal jaws. While most predatory fish use suction to “inhale” their prey, moray eels just… pull them in.

The Mangrove Rivulus (Kryptolebias marmoratus), a species of killifish, mostly breeds by self-fertilization and can survive for about two months on land. Males are rare, and can only hatch from eggs kept below 19 °C (66 °F).

The most famous pupfish (family Cyprinodontidae, also a type of killifish) is probably the Devils Hole Pupfish (Cyprinodon diabolis). It is a critically endangered species found only in Devil’s Hole, a water-filled cavern in the US state of Nevada. When nearby agricultural irrigation caused the water to drop in the cavern, several court cases ensued, resulting in Devils Hole being declared a National Monument in 1952, including the preservation of adequate groundwater to maintain the pool. As of September 2022, the count showed a total of 263 observed wild pupfish, up from only 35 in 2013.

There are waaaay too many cool fish for me to write about; I keep thinking of cool facts but this is already getting so long and I gotta save some for if this class makes it to the next round 🥲

machine head and isotope from invincible. these two were totally dating btw

did you know sturgeon are as old as the dinosaurs and did you know they don't have teeth and did you know they can live to be 150 years old and weigh 200 pounds and be six beautiful feet long and did you know I'm in love with them

I hate it here. This fandom is a prison.

some more assorted doodles for this endearing comic <3