3 Things Fish Shouldn't Be Able to Do

TL;DR

Fish like archerfish, mangrove killifish, and tuskfish possess unique adaptations and abilities that allow them to hunt and survive in various environments.

Transcript

[ INTRO ] When you look at a goldfish in a bowl, it’s hard to imagine there’s much going on behind those googly eyes. But biologists have found lots of amazing things about fish, like how their swim bladders let them control buoyancy. Some fish even take their adaptations to the extreme—almost like they have superpowers. Take the archerfish, which ... Read More

Key Insights

• 🔫 Fish like archerfish possess incredible hunting skills, using precision and force to shoot down insects with jets of water.
• 😘 Mangrove killifish adapt to low-oxygen, high-hydrogen sulfide environments by growing interlamellar cell masses and utilizing their skin for breathing.
• 😋 Tuskfish challenge our understanding of tool use in animals, using rocks as anvils to smash clam shells and obtain food.
• 🖐️ Learning through observation and adaptive behaviors play a crucial role in the survival and hunting abilities of fish.
• 🙂 Fish adaptations involve calculations to compensate for light refraction and modifications in body structures to thrive in different environments.
• 😀 Archerfish's visual memory allows them to ignore non-target faces, even in black and white and cropped images.
• 👱 Mangrove killifish's skin is equipped with chemoreceptive neuroepithelial cells for detecting changes in air and triggering gill adaptations.

Questions & Answers

Q: How do archerfish shoot down insects with such accuracy?

Archerfish collect water in their mouths, then force it out by squeezing their gill covers closed. They compensate for light refraction by aiming carefully using their visual memory and observational learning skills.

Q: How do mangrove killifish survive on land?

When gills collapse and cease to work, killifish rely on their skin for breathing. They also grow interlamellar cell masses to protect their gills from drying out and increase blood flow to shuttle chemicals around.

Q: What unique adaptations do tuskfish demonstrate?

Tuskfish use rocks as tools to smash clam shells and obtain the edible parts. They select appropriate rocks and show repeated use, highlighting their ability to manipulate objects and alter their environment.

Q: Are fish capable of using tools?

While some argue that fish do not use tools because they don't grip the tool directly, fish lack limbs to hold onto objects. Considering their environment and anatomy, fish like tuskfish demonstrate complex skills that resemble tool use.

Summary & Key Takeaways

• Archerfish use their precise aim and powerful jets of water to knock down insects for prey, learning their hunting skills through observation and making calculations to compensate for light refraction.

• Mangrove killifish can tolerate low-oxygen, high-hydrogen sulfide muddy waters but can also survive on land by growing interlamellar cell masses and using their skin and gills to breathe.

• Tuskfish demonstrate tool use by using rocks as anvils to smash clam shells and obtain the edible parts.