On 26 November, the natural history museum, jointly with the Dutch Malacalogical Society, had a theme day on seashells and snails.
Rob Vink lectured there on nerites.
These snails are unique, in living not just from The Netherlands to the tropics; but also from fresh water to brackish water to oceans.
At the Kei islands, there were also Strombus bulla shells.
At Waigeo island were also big Nephilia spiders.
The next speaker, Piet van Pel, had also traveled far to find seashells.
He went to New Guinea, the Caribbean, and Australia.
Last named species lives only there, and near Curacao island.
Also Strombus taurus, from the Marshall islands.
Closer to home: Ensis directus, an invasive species from North America, now very common on Dutch beaches.
The BBC has filmed the moment when a venomous cone snail engulfs its prey, spears it with a harpoon-like barb, paralyses it and eats it. The fish-eating Conus geographus is the most venomous cone snail known: here.