The line “apparently taste like crab or shrimp” was clearly written by someone who’s never tried silkworm pupae. They taste exactly like they smell – when fresh, strongly of bug and sericin (silk gum); when dried, kind of fermented-dead-roach. If you’ve ever vacuumed up dead roaches and noticed that the vacuum kind of had a stank to it, that’s the smell. The “flavor” of them is one of those where it’s 99.5% smell – the one I tasted was bland as far as actual flavor (i.e., a sensation registered in the taste buds) except for a slight bitterness, and could have definitely used some salt.

Japan Aerospace Exploration Agency suggestions for using silkworm pupae as a protein source for space missions,