Boats And Boating

For my homework i have to make an A-Z list with a chosen theme. My theme is underwater so that can be any sea creatures or objects that has anything to do with the ocean or sea.

I am stuck with letters i, q, x, y, z.
Please give me any words starting with these letters that fits into my underwater theme.

This is what i have so far:

A – Anchor / Deep sea angler/ angel fish
B – Boat
C – Coral / Clown fish
D – Dolphin
E – Eel
F – Fish
G – Giant Squid
H – Hammerhead shark, sea horse
I –
J- Jelly fish
K – Killer whale/ Krill
L – Lobster
M – Mermaid /
N- Neon Tetra
O – Octopus
P- Penguin / Piranha
Q-
R – Ray (sting)
S – Seal/shark/starfish/swordfish/shell / Shrimp
T – Turtle/ Tuna
U – Urchin
V – Viper fish
W – Whale
X -
Y -
Z –