浜辺
amebocyte
animal
animal shell
animals mating
aquatic
arthropod
atlantic ocean
coastline
crab
crab horseshoe
crustace
crustacean
delaware bay
female animal
horseshoe
horseshoe crab
invertebrate
invertebrates
life
limulus
living
lysate
male animal
marine lysate
mating
nature
new jersey
ocean
polyphemus
research
saltwater
sand
sea
sealife
sex
shell
shellfish
spawning
the past
water
wildlife