Figure 2From: Microinjection into zebrafish embryos (Danio rerio) - a useful tool in aquatic toxicity testing?Developmental stages of a zebrafish embryo after injection of 4.2 nL triolein into the one-cell stage. Injected triolein droplet remains visible inside the yolk sac at (A) 2 hpf, (B) 24 hpf, and (C) 48 hpf.Back to article page