I loved this bright beauty! In the wild it grows over 6" wide and can be as much as a foot tall.
Here is my version which began as a round with randomly added tentacles. I did not create a base for it which would make it look a bit like a mushroom does but I may do that in the end.
Rnd1: make a circle with 4 ch sts
Rnd 2: sc 8-10 in the circle and mark the end of the rnd
Rnd 3: 2 sc in ea sc
Rnd 4: 2sc in nxt sc, sc in nxt sc. repeat around
Rnd 5: 2sc in nxt sc, sc in nxt 2sc. repeat around
Rnd 6: 2sc in nxt sc, sc in nxt 3sc. repeat around
Continue to increase the number of sc between increases until your piece is as large as you want it to be and tie off.
attach the yarn to the base using a sl st and chain 4, 5 OR 6. Then sl st the second ch from the hook and in ea remaining chain. tie off from the underside of the piece. NOTE that in hindsight, I would make the tentacles longer perhaps as much as double. That would translate to chain of 8, 10 or 12.
The tentacles are placed randomly using various lengths along the way in whatever pattern you prefer.