Perisserosa guttata azumai (Azuma's spotted cowrie), East China Sea
Mushrooms by Moonshroom
cypraea bregeriana - Google Search
Haliotis scalaris (Australia). Living on rocks in surge zones, their rippled surface creates eddies in water flow dynamics that help them to stay in place (clever, right?) We supplied some to the Max Planck Institute for Biomaterial research.