Pangasianodon Hypophthalmus Study Guide

The video discusses the largest river catfish, Pangasianodon hypothalamus, found in the Tonle Sap River, Cambodia. It highlights the fish's size, shape, and resemblance to a shark. The fish migrates from Tonle Sap Lake to the Mekong River for spawning. The video also covers the tagging process for research, aiming to track fish migration and behavior. Finally, the fish is released back into the river, with hopes of it continuing its journey.

What is the approximate weight of the Pangasianodon Hypophthalmus mentioned in the video?

• 70 lb

• 80 lb

• 60 lb

• 50 lb

Why is the Pangasianodon Hypophthalmus also known as the iridescent shark catfish?

• Because of its speed

• Because of its shape

• Because of its size

• Because of its color

Where was the Pangasianodon Hypophthalmus caught?

• Tonle Sap River

• Nile River

• Mekong River

• Amazon River

What is the significance of the fish's dorsal fin when it swims on the surface?

• It helps the fish to swim faster

• It makes the fish look like a shark

• It attracts other fish

• It helps the fish to breathe

What is a notable feature of the Pangasianodon Hypophthalmus's skin?

• It has scales

• It has a slime layer

• It is rough

• It is colorful

What is the purpose of tagging the Pangasianodon Hypophthalmus?

• To track its weight

• To monitor its diet

• To study its migration

• To observe its color changes

How many fish have been tagged in the last four years according to the video?

• 3,000

• 2,000

• 4,000

• 1,000

What is done to ensure the fish does not get caught again immediately after release?

• Release it near the bank

• Release it in a pond

• Release it in a net

• Release it in the middle of the river

What is observed about the fish after it is released back into the river?

• It stays near the surface

• It swims in circles

• It jumps once and then goes back down

• It swims slowly

What is the main reason for releasing the fish back into the river?

• To let it grow larger

• To allow it to continue its migration

• To observe its color changes

• To see if it returns to the same spot