What is a crypto whale?

Could you elaborate on the term "crypto whale" in the context of cryptocurrency and finance? I've heard this term used frequently but am not entirely clear on its definition. Is it referring to a specific type of investor or trader? Do they possess significant influence in the market due to their large holdings? How do they typically operate, and what kind of impact do they have on the price movements of various cryptocurrencies? Additionally, are there any strategies or tactics that crypto whales employ that are unique to their status?