Hello,
The first one is the Triton's trumpet or Triton Snail.
Charonia tritonis (Linnaeus, 1758) (Red sea-Indo-Pacific)
Charonia variegata (Lamarck, 1816) => Caribbean
bye
DAVID
The second looks like Tutufa bubo (Linnaeus, 1758) known as Frog seashell.
Bye
DAVID