What Are Live Feeds?
Types of Live Feed
Roles in Aquaculture
Types of Fish Larvae
Feed Selection Factors
100

Define “live feed”

Microscopic or small aquatic organisms fed alive to fish/shrimp larvae.

100

What is phytoplankton?

Microscopic plant-like organisms that photosynthesize

100

State one role of live feed

Provides essential nutrients to fish larvae

100

What is the term for the early stage of fish after hatching?

Fry or larvae

100

Name one factor affecting live feed selection for fish larvae.

Mouth size / Gape size / Digestive capability

200

Give 2 examples of zooplankton feed.

Rotifers, Artemia, Copepods, Moina, Daphnia

200

Difference between Phytoplankton and Zooplankton 

  • Phytoplankton = producers (plants)

  • Zooplankton = consumers (animals)

200

How live feed supports larval survival

Enhances growth, survival, and immunity

200

At which stage do fish larvae require first feeding?

Post-yolk sac absorption stage

200

Why is feed particle size important in larval feeding?

Larvae have small mouths and cannot eat large particles

300

Why live feed is preferred over dry feed in larval stage?

Easier to digest, stimulates feeding response, matches size of mouth.

300

Name one marine and one freshwater live feed

Marine: Artemia / Copepods; Freshwater: Moina / Daphnia

300

Why is early feeding crucial?

Larvae need external nutrition immediately after yolk sac absorption

300

Why certain fish larvae needs live feed

- Underdeveloped digestive systems and require small, easily digestible live feeds.

- Live plankton provides appropriate size, digestibility, and essential nutrients. 

- Larval fish are visual feeders; moving live feed like rotifers and copepods help trigger their feeding response, unlike static artificial diets. 

300

What is the main function of microalgae in live feed culture systems?  

Serve as food for zooplankton (e.g., rotifers)

400

Name a freshwater live feed species

Moina / Daphnia

400

Why are rotifers preferred in early larval feeding?

Small size, slow movement, easy to digest

400

Describe “first feeding” stage

Stage when larvae begin feeding externally, after yolk sac is absorbed

400

What is the difference between fry and fingerling?

Fry are smaller; fingerlings are older and larger with developed fins

400

Main difference between live feed and artificial feed?

Live feed consists of living organisms like rotifers, Artemia, or Moina, while artificial feed is manufactured, non-living feed in pellet or powder form.

500

Explain why live feed must be alive when fed to fry

Movement attracts larvae; ensures nutritional quality and freshness.

500

Which zooplankton is known for producing resting eggs (cysts)?

Artemia

500

Explain 2 key nutrients provided by live feed

Essential fatty acids (DHA, EPA), protein, HUFA

500

Marine fish larvae need what kind of feed?

Small live feed like rotifers or copepod/Artemia nauplii

500

When can artificial feed start replacing live feed in aquaculture?

When the larvae develop proper mouth size and digestive enzymes—typically during the weaning stage.

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