In this achievement you have to hook these creatures:
-Drowned vine man
-Drowned skeleton
-Drowned zombie
-Drowned Necromancer
-Drowned slime
-Pufferfish
-Turtle
-Squid
-Glowing squid

The only problem is that Drowned Necromancer can't be hooked which makes the achievement unobtainable. It's really frustratng because I wanted to get all of them :c