Fleas' only food is blood.
Fleas eat blood from animals like Cats,dogs ect.
bLOOD
blood
No, fleas are uniquely designed to suck blood.
"Else"? Besides what?
The COMMON FLEA doesn't eat- it gets all the nutrients it needs from sucking the blood of humans or animals. SAND FLEAS eat dead skin.(yuck!)Adult fleas must feed on blood in order to reproduce; however, adults can live for long periods without feeding.
they do not eat anything else besides fish, tuna, squid, and other crusances.
Same reason they like people, mice, rats, etc.....they have blood the fleas can eat.
They both are friends like mice don't eat flies
catfish
balls
They eat any small bugs such as scales