Cuttle skeleton Gastropod operculum Sea urchin test Seaweed holdfast Biscuit star Elephant snail shells Draughtboard shark egg case Catshark egg case Crab moult Chiton plates Brown Algae washed up Moon Snail with egg case Puffer Fish air bladder Puffer Fish Abalone shell Sponge 1 Sponge 2 Sponge 3 Cone Shell Lace Bryozoan Crab exoskeleton Pheasant … Continue reading Other Treasures