When I use REI Show Uses [u] on Clay I see it can be Sifted for multiple outputs (corals, kelp, seagrass). However searching for seagrass in REI and attempting to Show Recipe [r] comes up with nothing. I think there have been some other recipes that don't appear like this that have confused me, should they appear?

Ahh okay. No worries. Thanks for the reply

This is a known issue with REI, we haven't really found out how to fix it, sorry.