Pupfishes

Cyprinodon variegatus : Egg with blastodisc of 8 cells, optical section.

Cyprinodon variegatus : Egg showing later stage in differentiation of embryonic shield; EA, embryonic area; EEA, extra-embryonic area.

Cyprinodon variegatus : Larval fish 5 days after hatching, actual length 5 mm.

Cyprinodon variegatus : Egg with fully developed blastodisc (bd).

Cyprinodon variegatus : Egg with blastoderm showing germ ring, GR, fully differentiated and an early stage in differentiation of embryonic shield, ES; PP, posterior pole of blastoderm.

These are young pupfish, and apparently will turn blue later in the season.

The Death Valley pupfish (Cyprinodon salinus), also known as Salt Creek pupfish, is found in Death Valley National Park.

The Death Valley pupfish (Cyprinodon salinus), also known as Salt Creek pupfish, is found in Death Valley National Park.

The Death Valley pupfish (Cyprinodon salinus), also known as Salt Creek pupfish, is found in Death Valley National Park.

The Death Valley pupfish (Cyprinodon salinus), also known as Salt Creek pupfish, is found in Death Valley National Park.

The Death Valley pupfish (Cyprinodon salinus), also known as Salt Creek pupfish, is found in Death Valley National Park.

The Death Valley pupfish (Cyprinodon salinus), also known as Salt Creek pupfish, is found in Death Valley National Park.

The Death Valley pupfish (Cyprinodon salinus), also known as Salt Creek pupfish, is found in Death Valley National Park.

The Death Valley pupfish (Cyprinodon salinus), also known as Salt Creek pupfish, is found in Death Valley National Park.

Death Valley National Park in California on May 3, 2011.via wikipedia, by Jason Minshull