Only two clownfish, a male and a female, in a group reproduce through external fertilization.
12.
External fertilization is likely, possibly with ripe eggs held by the pelvic fins to facilitate fertilization.
13.
Also, aside from cephalopods, and arthropods, nearly all other invertebrates are hermaphroditic and exhibit external fertilization.
14.
"Anthopleura xanthogrammica " reproduce sexually via external fertilization of sperm and eggs in the late fall.
15.
In first half of 18th century, German Stephan Ludwig Jacobi experimented with external fertilization of brown trouts and salmon.
16.
In the most primitive salamanders such as the Asiatic salamanders and the giant salamanders, external fertilization occurs, instead.
17.
While the marine horseshoe crabs rely on external fertilization, air-breathing chelicerates use internal but usually indirect fertilization.
18.
After external fertilization, the lamprey's cloacas remain open, allowing a fungus to enter their intestines, killing them.
19.
The sexes are separate and, as with most echinoids, gametes are released into the water column and are conceived by external fertilization.
20.
Solitary ascidians release many eggs from their atrial siphons; external fertilization in seawater takes place with the coincidental release of sperm from other individuals.
