If a fish has a ventral fin, where is it located?

The cloacal fin is located on the ventral surface behind the anus/cloaca. This fin is used to stabilize the fish while swimming. The adipose fin is a soft, fleshy fin found on the back behind the dorsal fin and just forward of the caudal fin.

your answer is "the 1950's"

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.