in the first photo the first shell is Muricodrupa fiscella,the second and third shell would seem Ergalatax margariticula.
in the second pic looks like a rather young Rapana rapiformis
they seem
<a href="http://www.badongo.com/es/pic/8858871" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/es/pic/8858871">http://www.badongo.com/es/pic/8858871</a><!-- m --></a>
<a href="http://www.badongo.com/es/pic/8858883" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/es/pic/8858883">http://www.badongo.com/es/pic/8858883</a><!-- m --></a>
the first picture of the latter two could not be?
Peristernia philberti