In his History of Animals , Aristotle described the shellfish from which Tyrian purple was obtained and the process of extracting the tissue that produced the dye .
Vitruvius mentions the production of Tyrian purple from shellfish .
In his History of Animals , Aristotle described the shellfish from which Tyrian Tyrian was obtained and the process of extracting the tissue that produced the dye .
Vitruvius mentions the production of Tyrian purple from shellfish .