Here is the full list of all 35 Catch & Release achievements.
Catch 50kg of fish
Skip a pebble 3 times
Catch 1 fish
Cast reel at least 15m
Cast reel at least 5m
Catch the legendary Slackjaw
Complete the main questline
Catch 150 kg of fish
Catch 500 kg of fish
Catch 50 fish
Catch 100 fish
Cast reel at least 35m
Row 1km
Row 5km
Row 10km
Skip a pebble 5 times
skip a pebble 10 times
Catch a diamond ring
Release a boot back to the wilderness
Drink 6 beers
Drink 66 beers
Drink 666 beers
Catch each fish type once
Explore the whole lake
Buy all baits
Take all pictures
Sell five fish of a kind bigger than 100cm
Sell five fish of a kind smaller than 40cm
Sell four fish of a kind
Sell 3 fish of one kind and 2 of another
Sell five fish of a kind
Sell five different kinds of fish
Three fish of the same kind
Sell two fish pairs
Sell two fish of the same kind