Wikipedia:Sandbox

The Krill Paradox is when the number of whales in an ecosystem decreases, the krill population will in tern decrease with them. the krill paradox was first observed at the turn of the 20th century when technological advancements enabled the exploration of the Antartica and its seas. During the era of great explorers like Roald Amundsen, the population of both Blue Whales and Fin whales were in the millions. However, in only about 70 years, the Whaling industry had increased so dramatically that it reduced these populations by around 90%. In the wake of this, the krill population decreased exponentially by around 80%.

This discovery was initially shocking because it defied what we knew at the time about predator and prey relationships. In most other predator prey relationships, as the number of predators decreases, the number of prey should increase as a result. However at the height of the whaling industry, the population of krill was at an all time low as well. This continues to be a prevalent issue to this day, as the harvesting of krill threatens to harm many critically endangered species of whale.

https://news.stanford.edu/stories/2024/09/krill-harvesting-threatens-whale-recovery

https://mymba.mba.ac.uk/resource/the-fall-of-the-great-ocean-farmers.html#:~:text=Paradoxically%2C%20the%20abundance%20of%20krill,decrease%2C%20after%20predators%20are%20exterminated.

https://usa.oceana.org/blue-whale-and-krill/

https://www.nature.com/articles/s41598-019-52792-4

https://necsi.edu/predator-prey-relationships#:~:text=A%20predator%20is%20an%20organism,fish%2C%20and%20fox%20and%20rabbit.