Fig. 1

A map of the nine selected sampling sites (sites 1 to 9) along the Klip River
Fig. 2

The distribution of PAHs in sediment samples from the Klip River during the high and low flow seasons
Fig. 3

Ternary plots with percentage composition of detected PAHs in river sediments during the low (a) and high flow (b) seasons at the Klip River
Fig. 4

The hatch rates of zebrafish embryos exposed to sediments collected from sites 1 to 9 from the Klip River monitored for 96 hpf
Fig. 5

The mortality rate of zebrafish embryos exposed to the sediment collected from sites 1 to 9 from the Klip River monitored for 96 hpf
Fig. 6

The percentage malformations of zebrafish embryos exposed to sediments collected from sites 1 to 9 from Klip River monitored for 96 hpf and significant malformations (over 10%) indicated by a horizontal red line
Fig. 7

The heartbeat per minute of zebrafish embryos exposed to the sediment samples at 72 hpf, including the controls
Fig. 8

The blood flow activities of zebrafish embryos at 72 hpf exposed to sediment samples, including the controls
Acknowledgments
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