The Giant triton (Charonia tritonis) is a "conch" which refers to many different medium to large sea snails whose shells have a noticeable point at both ends. This particular conch is protected in Seychelles.
Conchs (say "Konk") are gastropods, which is the most successful class of mollusk with over 60,000 species known -- over ten times more than mammals. Gastropod means stomach & foot. Throw a few tentacles and a shell on, and you have a conch.
The Giant Triton appears on a few different coins, but usually after it is dead and only the shell is left. The Seychelles coins are nice in that they show the live animal. This coin was minted in 1976, and apparently a few rare examples were minted in 1977.
All coin images in Daniel's Coin Zoo are from my personal collection. I collect, research, and personally photograph every coin displayed on this site. PLEASE do not take my images without permission. If you would like to use any coin image you see, just ask me. Thank you.