What is the longest living saltwater fish?

It's difficult to say definitively which saltwater fish lives the longest as there's still much we don't know about the lifespans of many deep-sea creatures. However, some contenders for the title of longest-living saltwater fish include:

* Greenland shark (Somniosus microcephalus): These slow-moving sharks are estimated to live for hundreds of years, with some individuals potentially reaching over 400 years old. This makes them one of the longest-living vertebrates on Earth.

* Ocean quahog (Arctica islandica): This clam is known to live for over 400 years, with the oldest recorded individual being 507 years old. While not technically a fish, it is a saltwater creature and holds the record for the longest lifespan of any known animal.

* Orange roughy (Hoplostethus atlanticus): This deep-sea fish can live for over 150 years, making them one of the longest-living bony fishes.

* Rockfish (Sebastes spp.): Some species of rockfish can live for over 200 years.

It's important to note that these estimates are based on limited data and further research is needed to confirm the actual lifespans of these creatures.