meaning of secondarily in this sentence
Pristella maxillaris.jpg
study of the form or morphology of fishes
August 2020
Anatomie des poissons
The deep sea half-naked hatchetfish has eyes which look overhead where it can see the silhouettes of prey.
right
Budowa organizmu ryb
Diagram showing the external anatomy of a Hector's lanternfish, a type of bony fish
A vertebra of a small ray-finned fish
horizontal
The X-ray tetra has a visible backbone. The spinal cord is housed within its backbone.
vertical
Vertebre pesce 20130806 04.jpg
تشريح الأسماك
Lampanyctodes hectoris .svg
Internal organs of a fish.svg
Argyropelecus hemigymnus.jpg
Anatomi ikan
Zenion hololepis is a small deep water fish with large eyes.
External anatomy of a bony fish : 1. operculum , 2. lateral line, 3. dorsal fin, 4. adipose fin, 5. caudal peduncle, 6. caudal fin, 7. anal fin, 8. photophores, 9. pelvic fins , 10. pectoral fins
Anatomía de los peces
Zenion hololepis.jpg
Internal anatomy of a bony fish
Molecular analysis meaning genetic analysis? Or another definition?
Diagram showing the internal anatomy of a generic bony fish
Fish anatomy
Anatomia ryb