sand dollar
Flat sea urchin
A sand dollar is a flat, disc-shaped sea urchin that lives in sandy ocean floors.
The familiar white "shell" found on beaches is actually the animal's skeleton, called a test, left behind after death.
Living sand dollars are covered in short, velvety spines and burrow just beneath the sand's surface.
The name comes from their resemblance to large coins.
Spiny marine echinoderm
- testEvaluative examination
- ossiclesMinute skeletal structures
- tube feetHydraulic locomotion appendages
- radial symmetryArrangement around central axis
invertebrate · keyhole · lunule · spines · cilia · endoskeleton · Aristotle's lantern
Coastal rock hollow holding seawater
- seabedUnderwater terrain below
- shallow waterLow-depth aquatic area
- intertidalZone between high and low watermarks
- subtidalPermanently below waterline
coastal · estuary · Pacific coast · lagoon · ocean floor · benthic · burrowing · buried
Gathering marine exoskeletons
- souvenirToken from a trip
- driedStripped of moisture
- bleachedHad color removed
- fragileEasily broken or damaged
display · seaside · shoreline · driftwood · seashell · beach walk · treasure hunting · ornament
Favorable chance or fortune
- legendUnverified traditional tale
- Easter lilyWhite trumpet flower
- Christian symbolismVisual signs of faith
- folkloreInherited cultural narratives
mythology · talisman · keepsake · gift · spiritual meaning
Study of ancient organisms
- CretaceousFinal Mesozoic period
- JurassicDinosaur-dominated geological period
- fossilizationOrganic remains becoming mineral
- petrifiedSolidified or fear-paralyzed
mineralization · sediment · strata · impression · prehistoric · specimen · extinction · sedimentary rock
sea urchin
Spiny marine echinoderm
- testEvaluative examination
- ossiclesMinute skeletal structures
- tube feetHydraulic locomotion appendages
radial symmetry · invertebrate · keyhole · lunule · spines · cilia · endoskeleton · Aristotle's lantern
tidepool
Coastal rock hollow holding seawater
- seabedUnderwater terrain below
- shallow waterLow-depth aquatic area
- intertidalZone between high and low watermarks
subtidal · coastal · estuary · Pacific coast · lagoon · ocean floor · benthic · burrowing · buried · camouflage
shell collecting
Gathering marine exoskeletons
fragile · display · seaside · shoreline · driftwood · seashell · beach walk · treasure hunting · ornament
good luck
Favorable chance or fortune
- legendUnverified traditional tale
- Easter lilyWhite trumpet flower
- Christian symbolismVisual signs of faith
folklore · mythology · talisman · keepsake · gift · spiritual meaning
paleontology
Study of ancient organisms
- CretaceousFinal Mesozoic period
- JurassicDinosaur-dominated geological period
- fossilizationOrganic remains becoming mineral
petrified · mineralization · sediment · strata · impression · prehistoric · specimen · extinction · sedimentary rock
- beachcombingseashell, shells, driftwood, sea glass, shark tooth
- echinodermssea urchin, echinoderm, sea star, sea cucumber, brittle star
- clypeasteroidssea biscuit
- irregular urchinssea biscuit, Moira
- coastal objectslighthouse, pier, dock, jetty, seawall
- coastal wildlifepelican, grey seal, seagull, gull, dolphin
sand dollardollar bill
One unit of currency
silver dollar · real money · legal tender · dollar coin · paper money
sand, sandy, dollar, sands, sandbox, sanded, sanding, sandpaper, dollar bill