How does Gymnarchus niloticus build and protect its floating nest?

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Gymnarchus niloticus constructs its nest by biting off the stems of swamp grasses and weaving them into a large, trough-shaped floating structure that measures approximately 50 cm (20 inches) in length.1

Once spawning occurs within this nest, one or both parents provide protection by guarding the developing young for a period of about 18 days.1