Page "Zebrafish" Paragraph 6

To encourage the fish to spawn, some researchers use a fish tank with a sliding bottom insert, which reduces the depth of the pool.

The technique is most effective in the early morning, given that ovulation and spawning are enhanced by light.

Researchers have been able to collect 10, 000 embryos in 10 minutes using this method.

Male zebrafish are furthermore known to respond to more pronounced markings on females, i. e., " good stripes ", but in a group, males will mate with whichever females they can find.

What attracts females is not currently understood.

The presence of plants, even plastic plants, also apparently encourages spawning.