narwhal
Definition
Narwhals (Monodon monoceros) are large, toothed whales that live in the Arctic Ocean. They are the only whales with a tusk, which is a long, spiralled tooth that grows from the upper jaw of males. The tusk can grow up to 10 feet long and is used for a variety of purposes, including fighting, mating, and detecting prey.
Narwhals are social animals and live in groups of up to 30 individuals. They are also very vocal and communicate with each other using a variety of sounds. Narwhals are carnivores and their diet consists mostly of fish, squid, and shrimp.
Narwhals are an endangered species and their numbers are declining due to climate change, pollution, and hunting.
Narwhals are fascinating creatures and their unique tusk has captured the imagination of people for centuries. They are an important part of the Arctic ecosystem and their conservation is essential.
How can the word be used?
The narwhal is the only whale with a long, spiral tusk.
Different forms of the word
There are no other forms of the word "narwhal" in the English language.
Etymology
The word "narwhal" comes from the Old Norse word "narhvalr," which means "sea unicorn." The Old Norse word "narhvalr" is made up of the words "narr," which means "nose," and "hvalr," which means "whale.".
Question
What is a narwhal?
AQA Science Exam Question and Answer
Question:
Describe the unique features of narwhals and explain their potential significance in their natural habitat.
Answer:
Narwhals, often referred to as the "unicorns of the sea," are marine mammals known for their distinct features. One of their most remarkable features is the long tusk that extends from the upper jaw of males, which is actually an elongated tooth. This tusk can reach lengths of up to 10 feet and has garnered much attention for its unusual appearance.
The tusk of narwhals is believed to serve various purposes. While its exact function is not fully understood, scientists speculate that it may play a role in mating rituals, communication, breaking through ice, or even sensing changes in the environment such as water temperature and salinity. Additionally, narwhals possess a flexible neck joint that allows them to move their heads in various directions, adapting to their icy surroundings.
In their natural habitat, which primarily includes Arctic and subarctic waters, narwhals rely on their specialised features for survival. Their streamlined bodies and powerful tails enable them to navigate through icy waters with agility. Their tusk, though enigmatic, likely aids them in various behaviours crucial for survival in this challenging environment.