Ornamental fish culture — A/L Biology

How do I practise Ornamental fish culture?

1 question with a worked solution

1. Which commercially significant ornamental aquarium fish species reproduces by ovoviviparity (internal fertilization giving birth directly to free-swimming fry)?
   1. A) Angel fish (Pterophyllum scalare)
   2. B) Guppy (Poecilia reticulata)
   3. C) Goldfish (Carassius auratus)
   4. D) Zebra danio (Danio rerio)
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   Correct answer: B) Guppy (Poecilia reticulata)

   The guppy (Poecilia reticulata) is an ovoviviparous livebearing fish. Males possess a modified anal fin called a gonopodium to transfer spermatophores into the female's genital tract. Eggs are fertilized internally and develop inside the female without placental connection, emerging as free-swimming fry.

   Show worked solution

   Step 1: Classify ornamental fish reproduction: - Egg-layers (oviparous): Goldfish, Angel fish, Zebra danio, Barbs. - Livebearers (ovoviviparous): Guppy, Swordtail, Platy, Molly. Answer: Guppy (Poecilia reticulata).
   Modelled on: the A/L Biology examination pattern

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Where does Ornamental fish culture fit in the syllabus?

Year 2 · Term 3