Baby Pygmy Seahorses! 
"Every morning, the male and female do 30-60 minutes of synchronized twitching." :D 
(GIF / footage by Richard Ross)
Black belt cichlid with fry.

Guys, my German Blue Rams have fry. I never even saw them lay eggs.

All my excites.


Aphyosemion australe (by DevyatkinAnton)
Pair of kribensis cichlids displaying at one another. Kribensis are sexually dimorphic. The male, is larger and less colorful with a pointed dorsal fin that extends beyond the caudal fin. The female’s fins are rounded and display a lot more color. The female pictured is not yet in breeding condition.
When juveniles, it is still easy to sex these fish; the color does not extend to the end of the female’s dorsal fin and males exhibit a pointed anal fin. 
When full of eggs, females develop a bright magenta rounded belly. Females will actually compete for the strongest male’s attention by dancing in front of him and showing off her belly. Males show a preference for the brightest pink, enough that they will choose albino females (whose egg spots contrast very sharply against their white base) over wild-type color morphs. 
After courtship, the pair choose a cave to spawn. In an aquarium, this cave can be anything from driftwood, to broken flowerpots, or even pvc pipes. The female lays her eggs on the roof and entices the male to fertilize them. 
Because they are secretive during spawning, most fish keepers do not realize what has happened until the pair begin to take their fry out for excursions around the tank. 
pH plays a significant role in the sex of the fry. Acidic water produces mostly females, alkaline water produces almost all males and a neutral pH will create an even sex ratio. Cichlids are known for their excellent paternal care and kribensis are no exception.

Jack by cdpross on Flickr.

giraffe-in-a-tree: Lifalili Jewel Cichlid (Hemichromis lifalili), from the African rift valley
(photo by Lars K Photography | Flickr)

Smooth Trunkfish by James Scott