Invertebrates
Cleaners, crawlers, and filter-feeders—the unsung heroes that keep reefs tidy and interesting.
Clams
Tridacna showpieces that love bright light and stable calcium/alkalinity.
Crabs
From emerald algae-eaters to porcelain filter-feeders—quirky and useful, with occasional mischief.
Feather Dusters / Worms
Delicate crowns on tube worms that filter fine foods from the water column.
Hermit Crabs
Shrimp
From cleaner ‘fish spas’ to fire-red showpieces—helpful and eye-catching citizens.
Snails
Algae and film grazers for glass, rock, and sand—quiet, steady caretakers of the reef.
Stars
From sand-sifters to brittle stars—some are helpful, others delicate; research species needs.
Urchins
Spiky algae mowers that also ‘decorate’ themselves—great cleaners, watch your frags.