Refine Results
The Reef Feed
Scroll endlessly. Discover curated reef content — from events to guides, tips, and threads.
Tube Anemone
Tube anemones are burrowing sandbed predators that need a deep, stable substrate, gentle flow, and regular meaty feedin…
Condylactis Anemone
Condylactis (Condy) anemones are hardy, bold centerpiece anemones that need a stable, mature reef with moderate–high li…
Haitian Anemone (Condy)
Haitian Anemone (Condy) is a Condylactis anemone that needs a stable, mature tank with moderate–high light, gentle flow…
Bubble Tip Anemone
Bubble Tip Anemones are rewarding centerpiece anemones that thrive in mature, stable reef tanks with strong, consistent…
Hydroids
Hydroids are stinging colonial polyps that hitchhike into reef tanks and can spread across plugs, racks, and rockwork. …
Myrionema Hydroids
Myrionema hydroids are stinging colonial polyps that often spread around zoa mats and frag plugs, causing localized zoa…
Christmas-Tree Hydroid
Fire/Christmas-tree hydroids are stinging Pennaria colonies that look like tiny feathery “mini trees” on plugs, racks, …
Ball Anemone
Ball anemones are hardy corallimorph hitchhikers that hide in shaded crevices and feed like tiny ambush predators. They…
Gorilla Crabs
Gorilla/xanthid crabs are common hitchhikers that can become predators in reef tanks, often causing mystery snail and h…
Acropora Red Bugs (Tegastes acroporanus)
Acropora red bugs are tiny parasitic copepods that irritate Acropora, causing reduced polyp extension, dull color, and …
Mantis Shrimp (Stomatopoda)
Mantis shrimp are predatory hitchhikers that often reveal themselves through clicking sounds and disappearing snails or…
Zoanthid-Eating Nudibranch
Zoanthid-eating nudibranchs are tiny, camouflaged predators that eat zoa polyps and can wipe colonies fast. They hide i…
Montipora-Eating Nudibranch (Phestilla subodiosus)
Montipora-eating nudibranchs are tiny coral predators that chew Montipora tissue, causing “nibbled” edges and scraped w…
Acropora-Eating Flatworm
AEFW are Acropora-specific flatworms that eat coral tissue, causing bite marks, poor polyp extension, and slow SPS decl…
Red Planaria Flatworms
Red planaria are common nuisance flatworms that multiply quickly in low-flow, detritus-rich areas. Heavy infestations c…
Vermetid Snails
Vermetid snails are tube-dwelling pests that spread on rock and frag plugs and feed with sticky mucus webs. Their webs …
Majano Anemone
Majano anemones are pest hitchhikers that can sting corals and spread quickly in reef tanks. Remove or control them ear…
Aiptasia
Aiptasia are fast-spreading pest anemones that hitchhike into reef tanks and sting corals. Catch and control them early…
Phytoplankton
Phytoplankton isn’t livestock—it’s food web support. Its main value is feeding pods and filter feeders and strengthenin…
Amphipods
Amphipods are beneficial micro-crustaceans that support reef stability by recycling waste and serving as natural live f…
Copepods
Copepods are foundational micro-crustaceans that support biodiversity and provide natural live food in reef tanks. They…
Ulva (Sea Lettuce)
Ulva (Sea Lettuce) is a fast-growing macroalgae used primarily for nutrient export and food web support. It thrives wit…
Dragon’s Tongue (Halymenia)
Dragon’s Tongue (Halymenia) is a display-friendly macroalgae that offers light nutrient export without aggressive growt…
Chaeto (Chaetomorpha)
Chaeto (Chaetomorpha) is a utility macroalgae used almost exclusively for nutrient export and pod habitat in refugiums.…
Gracilaria
Gracilaria is a reef-friendly macroalgae that provides steady nutrient export, pod habitat, and natural food for herbiv…
Asterina Starfish
Asterina starfish are common hitchhikers that usually act as harmless algae and biofilm grazers. In balanced tanks they…
Fromia Starfish
Fromia starfish are beautiful but demanding invertebrates that rely on mature reef surfaces for food. They require larg…
Sand-Sifting Starfish
Sand-sifting starfish clean sand by consuming the life within it, which makes them one of the most common slow-failure …
Serpent Star
Serpent stars are hardy, reef-safe scavengers that live in rockwork and clean up leftover food before it becomes a nutr…
Brittle Star
Brittle stars are reef-safe scavengers that live in rockwork and help clean up leftover food before it becomes a nutrie…
Tridacna Clam
Tridacna clams are light-driven reef animals that thrive only in stable, mature systems. Strong, consistent lighting an…
Squamosa Clam
Squamosa clams are one of the more forgiving giant clams, but they still require a stable, mature reef with consistent …
Crocea Clam
Crocea clams are high-light, rock-dwelling giant clams that demand stable chemistry and strong, consistent lighting. Th…
Maxima Clam
Maxima clams are high-light, light-driven clams that do best in mature, stable reef systems. They need strong, consiste…
Aquarium Controllers
Aquarium controllers centralize monitoring and automation for reef systems, allowing reefkeepers to track parameters, c…
Derasa Clam
Derasa clams are one of the more forgiving giant clams, but they still require a stable, mature reef with consistent li…
Collector Urchin
Collector urchins are effective algae grazers with a lot of personality, but they’re mechanically disruptive by nature.…
Pencil Urchin
Pencil urchins are strong, opportunistic algae grazers that work best in rugged, well-secured systems. They’re reef saf…
Longspine Urchin
Longspine urchins are powerful algae grazers best suited for large, well-secured reef tanks. They’re reef safe biologic…
Tuxedo Urchin
Tuxedo urchins are small, reef-friendly algae grazers that excel at controlling film algae and biofilm in mixed reefs. …
Pincushion Urchin
Pincushion urchins are small, reef-friendly algae grazers that work well in mixed reefs when given enough food. They’re…
Anemone Crab
Anemone crabs are specialized, symbiotic crabs that depend on a healthy host anemone to thrive. They do best in stable,…
Emerald Crab
Emerald crabs are opportunistic algae grazers that can be very effective when algae is present, especially bubble algae…
Porcelain Crab
Porcelain crabs are peaceful filter feeders that rely on moderate flow and suspended food rather than scavenging. They …
Blue-Leg Hermit Crab
Blue-leg hermits are active, hardy scavengers that help with algae and leftover food, but they’re more aggressive than …
Scarlet Hermit Crab
Scarlet hermit crabs are one of the most reef-friendly hermits available, known for grazing algae and biofilm without c…
Astraea Snail
Astraea snails are reef-safe algae grazers that clean film algae and biofilm from rock and glass. Their main downside i…
Cerith Snail
Cerith snails are versatile, reef-safe grazers that work across rock, glass, and sandbed edges, making them one of the …
The feed is only the surface
Jump into the content behind the activity
From the Knowledge Base
Guides worth bookmarking
The Conversation Continues
Threads the community is buzzing about
Filter by curiosity
Topics and categories that help you find the good stuff
Keep exploring
Articles, discussions, events, builds, and categories all start here