X-ray tetra is a fish species. It begins with the letter x.
Xenophthalmichthys Danae is a fish species found in the ocean.
sea horse!
King mackerel is a sea creature. It is found in the Gulf of Mexico.
jellyfish
A hard shelled sea creature is the barnacle.
its not a fish its a sea creature Isopod
octopus
Urchin
queen fish
turtle
jellyfish
tekajsn
Tortoise Tuna