Figure 2

Ontogeny of presumptive stomach ( transparent light blue ) and GI-tract lumen ( blue ) in Atlantic halibut larvae. 3D models were reconstructed from serial histological sections using Imaris software. GI-tract lumen is represented by the inner layer (facing the lumen) of the GI-tract. The GI-tract is seen from three angles; left, right, and dorsal side. Arrows indicate the anterior direction (mouth). Arrow heads point to position of sphincters (red: pyloric sphincter; black: ileorectal sphincter). st presumptive stomach/stomach, mg midgut, hg hindgut.