| Longitudinal sections (LS) | Image | Respiratory and vascular system | Digestive system | Urinary system | Sensory and nervous system | Other organs | 
|---|---|---|---|---|---|---|
| Gills | Intestine | Eye, inner ear  | Thymus | |||
| Gills | Liver, intestine, swimbladder  | Eye, inner ear  | Spleen | |||
| Postcardinal vein , gills, pseudobranchs | Mouth, swimbladder, pancreas, intestine, liver  | Kidney | Nostril, eye, brain  | Spleen, thyroid follicles  | ||
| Heart, gills, pseudobranchs | Mouth, swimbladder, pancreas, intestine, liver, oesophagus | Kidney | Nostril, brain  | Ovary, thyroid follicles  | ||
| Heart, gills  | Swimbladder, pancreas, intestine, liver, oesophagus, anus, tongue  | Brain | Oviduct, thyroid follicles  | |||
| Heart, gills  | Tongue, buccal cavity, oesophagus, swimbladder, anus, liver, gall bladder, intestine, pancreas  | Kidney, urinary papilla , bladder  | Spinal cord, notochord | Ovary,  genital papilla  | ||
| Heart, gills, operculum | Tongue, buccal cavity, oesophagus, swimbladder, intestine, pancreas, liver, gall bladder  |  Kidney  | Brain | Ovary, genital papilla  | ||
| Operculum | Iris, lens, retina, cornea, inner ear  | Thymus | ||||
| Heart, gills  | Tongue, buccal cavity, oesophage, liver, intestine, pancreas, anus, swimbladder  | Kidney, bladder  | Spinal cord, notochord | Testis | ||
| Heart, gills  | Tongue, buccal cavity, liver, intestine, pancreas, swimbladder, oesophagus | Kidney | Spinal cord, notochord  | Hypophysis, testis | ||
| Gills | Retina, lens, inner ear  | Thymus |