Description

Porcelain Crab (Family Porcellanidae)
Porcelain Crabs are small, reef-safe crabs known for their flat, rounded bodies and oversized front claws. Despite their intimidating appearance, they are peaceful filter feeders, using specialized fan-like appendages to capture plankton and suspended particles from the water column. Many species are found living among rocks, coral rubble, or even within sea anemones, where they gain protection while helping keep the water column clear of fine debris. Their hardy nature and unique feeding behavior make them an excellent choice for hobbyists looking to add variety to their cleanup crew.

  • Care Level: Easy to Moderate

  • Reef Safe: Yes

  • Diet: Plankton, fine suspended foods, detritus

  • Behavior: Peaceful filter feeders; may form symbiotic relationships with anemones or corals

  • Recommended Tank Size: 20+ gallons

🦀 Porcelain Crab (Atlantic)
Scientific Name: Porcellanidae sp.
Common Name: Porcelain Crab
Size: ~1.5 inches
Reef Safe: ✅ Yes
Temperament: Peaceful
Diet: Suspension feeder – filters plankton and fine particles from the water column
Tank Role: Filter feeder and passive micro-scavenger

Porcelain Crab - Porcellanidae

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      DescriptionDescription

      🔍 Description:
      Porcelain Crabs are flat-bodied, anemone-dwelling filter feeders with delicate, fan-like appendages they use to catch plankton from the water. They’re often found living peacefully among the tentacles of anemones or nestled into rocky crevices. With ornamental patterns, usually speckled in red or blue, and elegant feeding movements, they are a standout addition to peaceful reef aquariums.

      Despite the name, they’re not true crabs — they’re more closely related to squat lobsters and are completely harmless to corals, fish, and inverts.

      Must HaveMust Have

      ✅ Why They're a Must-Have:

      Reef Safe Filter Feeder: Won’t bother any tank mates — feeds on suspended micro-foods.
      Beautiful and Peaceful: Aesthetically striking and non-aggressive.
      Great for Anemone Tanks: Forms a loose commensal relationship with Bubble Tips and similar hosts.
      Low Bioload: Perfect for nano reefs or minimalist systems.

      Notes for SuccessNotes for Success

      ⚠️ Notes for Success:

      Needs Planktonic Food: Target-feed phytoplankton or microplankton for long-term success.

      Can Be Fragile: Sensitive to poor water quality or aggressive tank mates.

      Better in Calm Flow: Strong currents can make feeding difficult — aim for moderate, consistent flow.

      May Compete With Similar Feeders: Avoid pairing with too many other passive suspension feeders in small tanks.

      Best Used ForBest Used For

      🧽 Best Used For:

      Nano and peaceful reef tanks with calm zones

      Anemone hosts like Bubble Tip Anemones (Entacmaea)

      Hobbyists looking for a unique, passive display invert

      Description

      Porcelain Crab (Family Porcellanidae)
      Porcelain Crabs are small, reef-safe crabs known for their flat, rounded bodies and oversized front claws. Despite their intimidating appearance, they are peaceful filter feeders, using specialized fan-like appendages to capture plankton and suspended particles from the water column. Many species are found living among rocks, coral rubble, or even within sea anemones, where they gain protection while helping keep the water column clear of fine debris. Their hardy nature and unique feeding behavior make them an excellent choice for hobbyists looking to add variety to their cleanup crew.

      • Care Level: Easy to Moderate

      • Reef Safe: Yes

      • Diet: Plankton, fine suspended foods, detritus

      • Behavior: Peaceful filter feeders; may form symbiotic relationships with anemones or corals

      • Recommended Tank Size: 20+ gallons

      🦀 Porcelain Crab (Atlantic)
      Scientific Name: Porcellanidae sp.
      Common Name: Porcelain Crab
      Size: ~1.5 inches
      Reef Safe: ✅ Yes
      Temperament: Peaceful
      Diet: Suspension feeder – filters plankton and fine particles from the water column
      Tank Role: Filter feeder and passive micro-scavenger

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