Acorn Barnacle
Species principle: Fixed Filter
Feed from the tide.
Patience becomes productive when position is chosen well.
Barnacles cement themselves to hard surfaces and feed by extending feathery appendages to filter food from passing water.
Animal Powers
Filtration
Feed from the tide.
Animals grouped here express a similar power through their behavior in nature. Each species still has its own principle, lesson, meaning, and field-guide page.
10 species
American Paddlefish
Species principle: Paddle Sense
Feel the river.
Odd shapes become elegant when they read what ordinary senses miss.
American Paddlefish use long paddle-shaped rostrums rich in electroreceptors to detect plankton while filter feeding in large river systems.
Basking Shark
Species principle: Plankton Straining
Strain the sea.
Great size can be sustained by gathering what the ocean offers in tiny pieces.
Basking Sharks are enormous filter-feeding sharks that swim with their mouths open to strain plankton from seawater using gill rakers.
Flat Porcelain Crab
Species principle: Porcelain Filter
Filter with grace.
Soft strength can be steady, useful, and precisely positioned.
Porcelain Crabs are small crab-like crustaceans that use feathery mouthparts to filter food particles from moving water.
Freshwater Pearl Mussel
Species principle: Pearlbed Patience
Filter and last.
Quiet usefulness can last when it is rooted in place and water quality.
Freshwater Pearl Mussels filter river water and can live for decades while depending on healthy streams and fish hosts for reproduction.
Giant Barrel Sponge
Species principle: Barrel Filtration
Filter with patience.
Service can be quiet when the body is built to clean what flows through it.
Barrel Sponges are long-lived reef sponges that filter large volumes of seawater and provide structure in tropical reef ecosystems.
Greater Flamingo
Species principle: Lake Filtration
Filter the lake.
Grace becomes practical when it knows exactly what to filter.
Greater Flamingos use specialized filter-feeding bills and long legs to feed on small organisms in shallow saline and alkaline waters.
Mediterranean Feather Star
Species principle: Feathered Current
Feather the current.
Gentle movement can still be a feeding strategy.
Feather Stars use many feathery arms to cling, crawl, swim, and filter food particles from moving water.
Skeleton Panda Sea Squirt
Species principle: Patterned Colony
Many bodies, one pattern.
Shared structure can turn many small bodies into one recognizable presence.
Sea squirts are tunicates that often live in colonies, filtering water and forming repeated body patterns.
Venus' Flower Basket
Species principle: Glass Architecture
Strong in glass.
Fragility can become structure when design is precise.
Glass Sponges have silica skeletons, live mostly in deep or cold waters, and form intricate filtration structures in low-light habitats.