Catla

A fast-growing surface and mid-water plankton feeder that anchors composite carp production.

Also known as: Catla; Katla; South Asian carp; Indian major carp

Water

Freshwater

Behaviour

Surface/mid-water feeder

Feeding

Planktivore

Culture route

Composite pond or reservoir

Status

Established Indian major carp

Catla is a deep-bodied Indian major carp valued for growth and market size. Its surface-oriented feeding niche complements Rohu and bottom-feeding carps, but strong plankton production can also create oxygen and pH swings that demand close pond management.

• Very deep body with a broad, upturned head and large mouth.
• Surface to mid-water feeder specializing in zooplankton, especially during younger stages.
• Popular whole fish with high regional market recognition.

Catla is an iconic Indian major carp cultured throughout South Asia. Induced breeding and composite culture made planned seed and grow-out possible beyond reliance on seasonal river collection.

Catla occupies rivers, reservoirs and floodplain waters. It feeds primarily in the upper water column, filtering and capturing plankton. In culture ponds it benefits from productive water, but excessive bloom density can create instability.

A riverine seasonal spawner that is commonly propagated through induced breeding. Warm water supports growth, and juvenile stocking is often coordinated with Rohu and other carps to use pond food resources efficiently.

Warm productive freshwater ponds, reservoirs and river-connected habitats with adequate depth, plankton and oxygen.

Temperature

25-32 °C Parameter Early planning target

Salinity

Freshwater; typically below 2 ppt

pH

7.0-8.5

Dissolved oxygen

Target at or above 5 mg/L

Additional control focus

Track oxygen through the daily cycle, plankton density, pH swing, alkalinity, ammonia, transparency and feeding response.

Validate stage-specific targets, alarm limits and nitrogen thresholds through the approved system design.

• High-quality protein
• Lean to moderate fat depending on size, feed and season
• Provides phosphorus, selenium and useful unsaturated fatty acids

Nutrition varies with feed, environment, season, harvest size, body portion and preparation. Use approved food-composition or laboratory data before publishing numeric per-100 g values.

Hatchery spawning produces spawn for nursery and fingerling rearing, followed by composite pond or approved reservoir grow-out. The production plan coordinates Catla with species occupying other feeding zones.

• Composite carp ponds
• Reservoir cages where appropriate
• Hatchery and nursery
• Freshwater RAS for selected stages
• Integrated pond farming

Use correctly identified, healthy seed with documented hatchery source. Catla can be confused with hybrids or mixed carp batches, so stock identity and uniformity deserve inspection.

Fine natural plankton is important to early stages. Nursery preparation, predator control, fertilization, supplementary feed and density should support survival without unstable blooms.

Catla uses upper-water food resources and is commonly grown with Rohu and bottom-feeding carps. Aeration and water monitoring must account for the whole pond community and daily oxygen cycle.

Natural zooplankton and supplementary or commercial feed contribute to growth. Feeding and pond fertilization should be recorded together to avoid overloading the ecosystem.

Seed screening, pond stability, nutrition and gentle handling reduce risk. Environmental stress, parasites and bacterial conditions require qualified diagnosis.

Deep-bodied fish need suitable mesh, careful crowding and low-drop handling. Partial harvest can manage market size if pond logistics permit.

Catla is commonly sold whole or in steaks. Icing, clean handling and quick market movement protect quality; the large head and body shape influence yield.

Catla has strong domestic demand, particularly at larger sizes. Buyer preferences and the balance with other carp harvests should define the stocking and sale plan.

Composite carp aquaculture remains a major production platform. Better hatchery genetics, nursery quality, oxygen management and cold chain offer practical improvement.

• Mixed or low-quality seed
• Plankton bloom and oxygen swings
• Correct polyculture balance
• Handling of deep-bodied fish
• Market size and harvest coordination

• Design pond aeration for pre-dawn oxygen risk, not only daytime readings.
• Stocking should complement the full polyculture feeding structure.
• Large head and body shape affect grading, netting and processing yield.
• Hatchery planning should protect broodstock and seed traceability.