silver/bala sharks get on well with most fish and are great in a community tank .
sharks eat whales sometimes because it depends on the type of shark it is
Piranhas eat guppies like crazy but they're a little dangerous to keep. Oscars along with most of the other African cichlids will eat them too. Actually any predator type fish will eat them.
Guppys are special fishes that DO NOT lay eggs. They give birth to young.
No. If you exclude the length of the tail (caudal) fin in some male guppys, under normal circumstances, female guppys grow to around double the size of male guppys
yes
no not really
No
no
Loan sharks.
Sharks are related to rays and skates, along with other cartilaginous fish.
Remora
no