Juvenile fish
Videos
Fish go through various life stages between fertilization and adulthood. The life of fish start as spawned eggs which hatch into immotile larvae. These larval hatchlings are not yet capable of feeding
Fry no longer depend on a yolk-sac and can feed themselves
A fingerling has developed scales and working fins
Salmon eggs. The growing larvae can be seen through the transparent egg envelope. The black spots are the eyes.
Salmon egg hatching into a sac fry. In a few days, the sac fry will absorb the yolk sac and become a salmon fry
Eel life history
Videos
Eels are any of several long, thin, bony fishes of the order Anguilliformes. They have a catadromous life cycle, that is: they migrate from fresh water into the sea to spawn. Because fishermen never c
Juvenile fish
…others) it is not an ecologically viable foodstuff and in several countries strict controls on harvesting exist. Glass eels are young eels, the stage in eel life history when eels first arrive in rivers and swim upstream from the sea in which they hatched. Because the eel cannot be farmed, eels have instead been caught…
1881, An Anatomy of the Eel in search of Reproductive Organs
Leptocephalus larva of an ocean eel
Glass eels at the transition between ocean and fresh water; the skin is still transparent and the red gills and the heart are visible; length about 8 cm
Juvenile eels, length about 25 cm