Crab – Freshwater Crab Large

Freshwater Crab Large – Tough Aussie Scavengers That Keep You Watching!

Freshwater Crab Large delivers strong claws and constant movement to carefully prepared tanks. These northern Australian natives dig and climb in their natural river and billabong homes. Aquarists enjoy watching these crabs to explore every corner when secure lids and hiding spots exist. Their hardy build suits keepers who prioritise escape-proof setups and watchful compatibility.

Size and Lifespan

Develop a solid carapace and broad legs as they mature. Adults commonly reach around 10 cm across. Good water quality and regular moulting support extended lives. Many remain active for several years with proper attention to their needs.

Ideal Tank Setup

Choose a spacious aquarium of at least 100 litres so they can move freely without stress. Install a heavy, gap-free lid since these crabs climb exceptionally well. To replicate its natural habitat, create land areas with rocks or driftwood emerging from the water, add sand substrate for burrowing, position multiple caves and shelters, and maintain gentle filtration with secure intakes.

Compatible Tank Mates

Often view smaller or slower fish as potential meals. They work best in controlled groupings where size differences reduce risk. Suitable tank mates include large, fast-swimming robust natives such as bigger perch or strong catfish that stay out of reach. Avoid small fish, delicate species, or live plants they may uproot and consume.

Diet and Feeding

Offer sinking invertebrate pellets as their main diet for balanced nutrition. Supplement with blanched vegetables, algae wafers, and occasional protein treats like bloodworms or fish pieces. Feed every 2–3 days in amounts they finish quickly. Remove leftovers promptly to prevent water fouling.

Breeding and Behaviour of Freshwater Crab Large

Spend time digging, climbing, and scavenging throughout the tank. Females carry eggs under their bodies until hatching occurs. They moult periodically and become vulnerable with soft shells. Provide extra hides during moulting periods and avoid handling to support natural recovery and breeding attempts.

Species Overview

• Species – Austrothelphusa agassizi
• Common Name – Freshwater Crab
• Origin – Northern Australia
• Diet – Carnivorous (scavenger)
• pH Range – 7.0 – 7.5
• Temperature – 18°C – 28°C
• Breed Type – Egg Layer
• Current Size – Varies, un-sexed
• Max Size – Approximately 10 cm
• Tank Size – Minimum 100 L for one crab, larger for multiples

FAQs about Freshwater Crab Large

What size tank is ideal for Freshwater Crab Large?
A minimum 100-litre aquarium provides essential space and room for land features and hides.

Can they live with other fish?
They may eat small or slow fish; pair only with large, fast natives or keep in species-only setups.

How often should I feed them?
Feed every 2–3 days with portions they consume fully to avoid waste.

Do they need to be in groups?
They tolerate company with ample space and hides, but monitor for territorial disputes.

How long do they live?
With secure conditions and good care, Freshwater Crab Large often reach several years.

Add a Freshwater Crab Large to Your Aquarium Today!