UMT MOOC: Ornamental Fish Culture - Topic 7: Seed Production - Factors to be Considered for Feeding - Zooplankton : Moina & Daphnia

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One key issue in larviculture (breeding and farming of fish or shellfish larvae) is sourcing and culturing of consistent live food source which are easily available and rich in nutrients and pigment. Our discussions and observations with different Betta sp. breeders leads us to three popular live feeds which are suitable in all life stages which are MoinaDaphnia pulex, and Daphnia magna. Since these three are genus of crustaceans (like prawn) and related to each other, they are collective known as Daphnia. It's also commonly known as "water fleas" due to its jerking and hopping movement or "kutu air" (Malay term) in most aquarium shops in MY. However, only a selected few aquarium shops which sell this live food during the weekend. The other options is to buy from other fish breeders or go collect it from sewerage and rivers.

What are the main difference between these three live feeds? Size. Moina is the smallest, follow by Daphnia pulex, and lastly Daphnia magna. Hence, Moina is a great food source for different life stages of fish from larvae, fry, and juvenile. Daphnia magna is more suitable for juvenile and adult fish. The video below illustrates the size differences.

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