Which fish has the biggest gills?

It's tough to definitively say which fish has the absolute biggest gills, as gill size can vary significantly depending on the fish's size, species, and lifestyle. However, some fish known for having very large gills include:

* Whale sharks: These gentle giants filter massive amounts of water to feed on plankton, requiring extremely large gills to support this process.

* Basking sharks: Similar to whale sharks, these sharks have enormous gill slits to filter plankton from the water.

* Mantas: These majestic rays also have large gill slits, filtering plankton from the water.

* Gillnetters: This term refers to fish known for having unusually large gill filaments, like the cod.

It's important to remember that "biggest" can be interpreted in different ways. Some fish might have larger overall gill surface area, while others might have larger individual gill filaments. Ultimately, the size and structure of a fish's gills are adapted to their specific needs and environment.