Recently I found some time to knit the crab from Amigurumi Knits. It actually knit up pretty quick, only taking 2 evenings and part of an afternoon.
Since the recipient was old enough to know that cooked crabs are red (and obviously didn't want to display a cooked crab...) we settled on teal for the body. We also wanted a more realistic shell colour and found a shiny yarn that variegated between ivory and sandy brown. The under colour was a fluffy yarn in a mostly ivory, somewhat sandy, colour to give the appearance of hairy bristles.
The pattern needed some modification as the recipient had no intention of receiving a 6 legged decapod with no body (as suggested in the original pattern). The extra 4 legs were easy: wrap the body colour around appropriately shaped pipe cleaners.
I knit up the body as follows:
In main body colour (called BC1 in the book), cast on 27 in the round. Knit 9 rows in stocking stitch. Unless specified otherwise, knit the following rows in BC1:
row 10: (K7, K2tog) 3x
row 11: K in under body colour (called BC2 in book)
row 12: (K6, K2tog) 3x
row 16: (K5, K2tog) 3x
row 17: K in BC2
row 18: (K4, K2tog) 3x
row 21: K2tog, K4, K2tog, K2tog, K3, K2tog (divide on 2 needles)
row 22: K in BC2
row 24: K2tog, K2, K2tog, K2tog, K3
row 25: KFB 8x
row 28: (KFB, K6, KFB) 2x
row 30: cast off
Use kitchener stitch to stitch up body, stuffing as you go. Sew 3 vertical rows in BC2 to make slits in tail.
Here are some actions shots of the end result.
Figure 1: Crab inside shell
Figure 2: Crab outside shell