Misc: In 1867 Battle of---------- ; Mexicans defeat Maximilian's forces (Cinco de Mayo).?

Questions

Common name for any of several different species of marine bivalve mollusks?

Common name for any of several marine spiny-finned food fishes?

Common name for any of several species of highly social bees known for their honey-hoarding behavior & their use as a domesticated species (beekeeping)?

Common name for any of the invertebrate animals making up two classes of the coelenterate phylum?

Common name for any one of numerous varieties of sweet fruits of the gourd family, that grow on two species of trailing vines?