Jellyfish don't belong on your head: a hat

This is a top down pattern that turns quite a few yards of yarn into a very silly hat.  All kinds of patterning could be tried on it.  I kept thinking about trying some intarsia in the round, but managed to do most of that thinking after it was started as just the basic grey.

The hat is constructed of  Lion Brand Fisherman Wool in oatmeal, natural, and maple tweed knitted on a #7 (4.5 mm) needle.  Magic loop knitting with a cable needle allows using a single needle.  On this needle, it is about 20 stitches 28 rows for 4", but the gauge isn't very critical.  A tapestry needle is needed to finish things off.

For the mantle, take the oatmeal, a rather grey color, or something quite bright:
Cast one 5 stitches.
1) kfb (knit in front and back) around: 10 stitches
2) kfb around: 20 stitches
3 and each row not mentioned) k
4) kfb, k1 to the end (10 repeats)
6) kfb, k2
8) kfb, k3
10) kfb, k4
12) kfb, k5
14) kfb, k6
16) kfb, k7
18) kfb, k8
20) kfb, k9
23) kfb, k1026) kfb, k11
30) kfb, k1234) kfb, k13
knit 12 rows
47) kfb, k14
knit 3 rows
51) kfb, k7 to end (20 repeats)
53) kfb, k8
54) yo, k1
Cast off knitting the yarn overs through the back loop.

Hat interior:
Pick up 100 stitches along the inside with a matching color.  A crochet hook can be helpful for this.

k 6 rows, then change colors (I went to the maple tweed) and knit about 3 inches.
Do some p2, k2 ribbing for another 1.5 inches or so and cast off:
k2, slip the stitches back and k2tog, then k1, slip, k2tog around.  Loop the last loop around the first to complete the circle and weave in.

Tentacles/oral arms:
These are worked while flipping the fabric rather than working back and forth.
Make 10 to 20 to distribute around the hat, I used the natural for these:

Tentacle 1: Cast on 36.
1) k6, kbl30 (knit through the back loop)
2) (k1, yo)x6, k2, (yo, k1)x23, k5
3) k52, w&t (wrap and turn: yarn forward, slip the next stitch, yarn back and slip it again, then flip the fabric)
4) (k1, yo)x46, k6
cast off

Tentacle 2: Cast on 36.
1) k6, kbl30
2) (k1, yo)x6, k2, (yo, k1)x23, k5
3) k52, w&t
4) (k1, yo)x12, k2, (yo, k1)x33, k5
5) k72, w&t
6) (k1, yo)x66, k6
cast off

Tentacle 3: Cast on 28.
1)  k6, kbl22
2) (k1, yo)x6, k2, (yo, k1)x15, k5
3) k36, w&t
4) (k1, yo)x12, k2, (yo, k1)x17, k5
5) k40, w&t
6) (k1, yo)x34, k6
cast off

Attach these around the hat at the color change using the tail from the cast on.

Weave in the ends and the hat is ready.