Murices

Here is today's distich by Martial, 13.87. You can read about the so-called "royal purple" dye in this Wikipedia article.

Sanguine de nostro tinctas, ingrate, lacernas
induis, et non est hoc satis, esca sumus.

O most ungrateful man, not only you
Do dye with me; but likewise eat me too.
- Wright

Here is the vocabulary:

murex - shellfish
sanguis - blood
de - from
noster - our
tingo - dye, color, stain
ingratus - ungrateful
lacerna - cloak, mantle
induo - put on, wear
et - and
non - not
sum - be, exist
hic - this, this one
satis - enough
esca - food

(image source)