Aquatic Alphabet - H

Welcome to the Aquatic Alphabet, where all letters are one with the sea! Help yourself to some trivia about the animals of the oceans that start with H!

Majority of the information used for this quiz is sourced from Wikipedia.

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Last updated: April 29, 2024

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First submitted	April 6, 2024
Times taken	10
Average score	35.0%
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These slimy eels are known for feeding on deceased or dying sea creatures on the sea floor.

Hagfish

This now extinct fish was shark-like, and had a spiral cluster of teeth in its lower jaw.

Helicorpion

Eating this fish is a Dutch tradition, so much that fishing and exporting this fish was essential to the Dutch economy.

Herring

The defining feature of this shark is the lateral projections on the sides of its head that make it look like a certain building utensil.

Hammerhead Shark

Nearly all flatfish of this species have both eyes on the right side of its body, but around 1 in every 20,000 have them on their left side.

Halibut

They move by walking on the sea floor with their pectoral fins rather than swimming.

Handfish

Also called the pigfish, this species has a continuous spiny dorsal fin with between 8 to 21 spines, and generally boasts a brown color.

Horsefish

Unable to grow their own shell, these scavengers occupy empty seashells that serve to protect their soft, vulnerable body.

Hermit Crab

These whales have one of the longest migrations of any mammal on Earth. They use bubble-net feeding to catch and eat prey.

Humpback Whale

They are related to cods, and 80% of the adults of this species have vanished from Argentine waters because of overfishing.

Hake

An early ancestor of fish that evolved during the Cambrian explosion. Though it was only around an inch, it still had a defined skull, head, and tail.

Haikouichthys

A serpentine water monster that was part of Greek mythology, which was also slain by Hercules as the second of this twelve labors.

Hydra

Also called a blue grenadier, this fish is one of species used to make McDonalds' fish sandwiches.

Hoki

The babies of this oceanic mammal are born with thick white fur. They are born on the ice surface, and their mother nurses them for only 12 days.

Harp Seal

A species of bullhead sharks that have spiral flanges around the casing of their eggs.

Horn Shark

They are related to cods, but a major difference is that fillets of this species are thinner and more fragile compared to that of cod.

Haddock

Their pectoral muscles allow them to jump several inches out of water to evade predators or to catch insects for food.

Hatchetfish

The reef triggerifish's Hawaiian name is especially long, and is translated to "triggerfish with a snout like a pig". Type its Hawaiian name.

Humuhumunukunukuāpuaʻa

This order of sea urchins is usually oval or heart shaped, with a star-like pattern on its body.

Heart Urchin

Only four species of this arthropod still exist today. They are known to arise out of the waters and spawn on beaches during high tides at full and new moons.

Horseshoe Crab

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