Meet the Air-Breathing Fish with Poisonous Eggs

The video explores the fascinating world of air-breathing fish, focusing on species like mudskippers, walking catfish, and lungfish. It highlights the unique adaptations of gars, which can breathe air and survive in low-oxygen environments. The video also discusses the reproduction of gars, noting their toxic eggs, and delves into the evolutionary significance of their armored scales. Gars are shown as ancient survivors with unique traits that have allowed them to persist for millions of years.

Which of the following fish is known to breathe through its skin when on land?

• Lungfish

• Mudskipper

• Walking catfish

• Alligator gar

What is a unique feature of gars that allows them to survive in low-oxygen environments?

• They have lungs like mammals.

• They can breathe through their skin.

• They have a specialized swim bladder for air breathing.

• They can absorb oxygen through their scales.

Where do alligator gars prefer to spawn?

• In sandy desert pools

• In rocky mountain streams

• In shallow grassy floodplains

• In deep ocean waters

What is the effect of gar eggs on humans?

• They have no effect on humans.

• They are a delicacy with no side effects.

• They cause nausea, sweating, vomiting, and diarrhea.

• They are highly nutritious and safe to eat.

What is the term used to describe the toxin found in gar eggs?

• Cytotoxin

• Icthyotoxin

• Neurotoxin

• Hemotoxin

What material are gar scales made of, which is similar to tooth enamel?

• Collagen

• Chitin

• Ganelin

• Keratin

How long ago did gars split off from the rest of the fish family tree?

• 100 million years ago

• 50 million years ago

• 200 million years ago

• 300 million years ago