Weekly Creature Feature. Is this made by a plant or an animal?

Bulk Single Sided Curl Sponges® (small grooves)

SEWACC 4pcs Ceramic Square Sponge Pottery Sponge Block Small Sponge Stencil Portable sponges Clay Sculpting Tools Artist Sponge face Sponge DIY Sponge

Sponge -- Natural Sea Wool

(750 Pack)Kheoxusa Individually Wrapped Sponges,Sponges Individually Wrapped for Kitchen Scrub Dish Wash Dishes Dishwashing Cleaning Non Scratch

Tolco® Yellow Cellulose Sponge - Small

Small Yellow Cellulose Sponge - Case of 48

Instant Erase Mini Sponges (24pk)

Registry Small In-Room Sponge, Sponges and Scouring Pads, Janitorial Supplies, Janitorial, Housekeeping and Janitorial, Open Catalog

FRCOLOR 12pcs Circle Sponge Sponges Ceramic Pottery Sponges for Throwing Paint Sponge Polish Wax Sponge Pottery Tools and Supplies Sponge Brushes for Painting Small Sponges Cake Child Ink

Synthetic Sponges (Pack of 2) @ Raw Materials Art Supplies