Catfish
Whiskers, spines, and river smarts
Biological mechanisms animals use for reproduction and fertilization.
Biological mechanisms animals use for reproduction and fertilization.
Sperm fertilizes egg inside the female's body, common in mammals, reptiles, and birds
Human-controlled reproduction through artificial insemination or selective pairing
Eggs and sperm released into water for external fertilization, common in marine…
Eggs deposited on surfaces with external fertilization and often parental care
Whiskers, spines, and river smarts
Low to the ground, nose on the trail
Spines, jaws, and ocean power
Built for brains, built for work
Beaks that build beaches
One cat. Two continents.
Born to work, built to last.
Farm-strong. Family-devoted.
Small rodents, huge tundra impact
Built to drive cattle all day
Browse all 7 categories
Eggs and sperm released into water for external fertilization, common in marine…
+176
Sperm fertilizes egg inside the female's body, common in mammals, reptiles, and…
+1,896
Human-controlled reproduction through artificial insemination or selective pairing
+496
Development from unfertilized eggs, producing offspring without male contribution
+9
Organisms that change sex during their lifetime, either male-to-female or female-to-male
+3
Organisms possessing functional male and female reproductive organs at the same time
+9
Eggs deposited on surfaces with external fertilization and often parental care
+174
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