Wallago | Definition of Wallago by Merriam-Webster.

Is Wallago a word?

Mentions of the word wallago: It is commonly known as helicopter catfish or wallago catfish. The name was submitted by Malaysia and refers to a species of huge freshwater catfish, called Wallago attu. Species of " Wallago " are large, predatory catfishes.

What is the definition of wallah?

: a person who is associated with a particular work or who performs a specific duty or service —usually used in combination the book wallah was an itinerant peddler— George Orwell.