Hi Ian!

Inverted Crab pose, AKA Reverse Tabletop pose, is a modification for Upward Plank pose. Your toes should be pointing forward and yearning towards your yoga mat. It's okay if they don't touch the mat yet, but that's the goal.

You can learn more about it here: https://www.yogajournal.com/poses/upward-plank-pose

Hope this helps!

Britteny