 Miller investigated the claim that the sea snail "Murex trunculus" was the source of the biblical "techeiles".In a letter on the subject, he wrote that he believes that there are several Talmudic proofs that the "Murex" is not the creature from which "techeiles" is produced, and that the evidence in support of the claim is insufficient to overcome these points.Prominent "techeiles" researcher Yisroel Barkin authored a comprehensive disputation of Rabbi Millers' letter.