Tiktaalik are the first fish to exhibit tetrapod like features according to fossil records. This is a key part of trying to figure out how fish may have came onto land and evolved further. They lived about 350-380 years ago and are theorized to have lungs and gills.
See image above for how we think they looked.
Plz request in comments for fish facts. I’ll pick the fish I know the least about n make tomorrow’s fact about it!