#fish larvae

[amasnatureart]

Larval Scalloped Ribbonfish

Acrylic speedpaint. Based off the photo here.

[encyclopika]

Animal Crossing Fish - Explained #56

Brought to you by a marine biologist with a small family...

CLICK HERE FOR THE AC FISH EXPLAINED MASTERPOST!

Most animals on Earth do not take care of their offspring. It’s just too much work, honestly. No, really, it is. Feeding and protecting tiny versions of yourself for weeks to years takes resources that are hard to come by, like food, shelter, and energy. Parental care is an evolutionary trade-off that will affect litter size and how well-developed the offspring are. Fish usually provide no parental care to their babies, as a rule of thumb. Today’s fish, the Angelfish, does, though!

It’s fun to catch these guy in Animal Crossing. They are pretty, unique, and honestly, I never get sick of seeing them while trying to get the rarer fish. Under a small shadow, just fish during its active hours and you’ll eventually get it. When you donate to the museum, they are put into that “aquarium” tank in the freshwater section with the other hobby-aquarium fish, like the Neon Tetra and Goldfish. And that’s accurate, because this species, the Freshwater Angelfish (Pterophyllum scalare) is popular with hobbyists the world over.

Native to the Amazon River basin and its tributaries, the Freshwater Angelfish lives in slow-moving streams and floodplains within its range. Those gorgeous stripes it has are actually its camouflage, allowing it to hide within the shadows and stems of submerged plants. 

Above I mentioned that the Freshwater Angelfish takes care of its young; in the wild and in the home aquarium, Angelfish will aggressively defend their babies against any other fish that gets too close for up to two months after the young hatch from their eggs, which the parents lay under plant roots and leaves. Although parental care is fairly rare in fish, it’s actually one of the hallmarks of the Family Cichlidae, the Cichlids, for which Angelfish belong. 

But besides that family, you really don’t see parental care in fish. As we’ve covered before, most bony fish (basically anything that isn’t a shark in ACNH, for reference) are either broadcast spawners, in which everyone comes together and spews out their eggs and sperm into the water to find each other and get taken by the current, or they lay their eggs somewhere and leave (or die, like salmon). The strategy is ultimately to make as many babies as possible, which overwhelms predators - they can’t possibly eat them all! Lots of species of fish will have MILLIONS of babies per spawning season, per female, which ensures that some will make it to adulthood. But that comes with a cost - to make that many babies, the babies themselves will be low-quality. Even after hatching, the babies are called “larvae” because they still have so much growing to do. Even for giants like Bluefin Tuna, their babies are just a few millimeters long.

^What fish larvae look like. 

And most fish have no concept of what fish larvae belong to them - adults will gladly eat baby fish, which means, in the aquatic environment, cannibalism is accidental, but not uncommon at all. It also means small filter feeders, like anchovy, are totally capable of eating their predators, and they do all the time. Stuff like this is what makes aquatic biology so different than terrestrial biology with similarly-sized animals. Saying an anchovy can eat a bluefin tuna, even as a larva, is nuts when you realize that’s analogous to saying “a zebra ate a lion cub”. It’s unheard of for us and other animals that put all their effort into parental care instead, giving birth or hatching just a few big, well-developed babies and then caring for them for a long time. That strategy ensures that all babies make it to adulthood, but at the cost of having more at a time. And that’s the trade-off - quantity or quality? 

And that’s what is really cool about the Angelfish. Their babies are still tiny larvae, but the adults protect them as best they can while the babies figure out how to get food on their own for two months. Even though that doesn’t sound like a lot, it’s enough to give Angelfish an edge.

And there you have it. Fascinating stuff, no?

[wishfishy]

A quick little painting of some opalescent fish larvae. 8x10, gouache on canvas.

[amasnatureart]

During my internship at NOAA Southeast Fisheries Science Center in Miami, Florida, I was given multiple fish larvae to draw under the camera lucida. It was such an amazing experience to be a true scientific illustrator working with scientists to broaden our understanding of fish early life.

Done in Pigma Micron pens. Drawn by me, Amanda Levine.

Visit my website for more scientific ilustration -> amandalevineart.weebly.com and follow me on Facebook https://www.facebook.com/AmandaLevineScientificIllustrator/

[facilitiesprovideteacherslgk]

The 404 Ways €“ How over against Proclivity Money: 001 Fish Thremmatology

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001 How to Make Money by means of Half dollar Farming <\p>

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[clausenk]

Some awesome unidentified fish!