There is 2 version of instructions of this Jellyfish this one is with cotton
Cotton version:
Crochet hook: 2.5 mm
Yarn: 8/4 Cotton - Super Fine weight (160 m / 50 g (1.75 oz / 174 yds)) - 8 g
Yarn needle
Stuffing
6 mm safety eyes
Chenille version:
Crochet hook: 5.5 mm
Yarn: Super bulky weight chenille (120 m / 100 g (3.5 oz / 131 yds)) (60 g)
Stuffing
18 mm safety eyes