Biology · General Awareness

Aquatic and Marine Biology

1,905 Questions

This hub covers key concepts in aquatic and marine biology, including fish anatomy, marine animal behavior, and commercial fisheries. These topics are essential for general science sections in various competitive exams. Use these resources to test your knowledge of diverse aquatic ecosystems.

Marine animal adaptationsCommercial fisheriesFish anatomyAquatic ecosystems

Aquatic and Marine Biology Questions

Multiple choice

Which of the following is an example of a fish?

  1. Snake

  2. catfish

  3. ant

  4. frog
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A catfish is a type of fish, characterized by gills, fins, and living entirely in water. The other options are a reptile, an insect, and an amphibian.

Multiple choice

Salmon meat gets is color from __. Without this, their meat is __.

  1. Krill, grey

  2. Shrimp, pink

  3. Eel, teal

  4. Eggs, black
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Salmon acquire their pinkish-orange color from consuming krill and other small crustaceans rich in carotenoids like astaxanthin. Without this natural diet, their flesh would appear pale or grey.

Multiple choice

How are sharks and rays different from other fish?

  1. They have eyelids

  2. Their bones are made of cartilage

  3. They are warm blooded

  4. They give birth to live young
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sharks and rays are cartilaginous fish (Chondrichthyes), meaning their skeletons are made of cartilage rather than bone.

Multiple choice

What is the largest species of shark?

  1. Great White Shark

  2. Tiger Shark

  3. Giant Serbotoo Shark

  4. Whale Shark
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The whale shark is the largest known extant fish species. It can grow to lengths of over 40 feet.

Multiple choice frog - control and coordination system frog animal diversity - ii (phylum: chordata) organ and organ systems in animals zoology

Tadpoles growing in ___________ water shows retarded growth.

  1. Iodine deficient

  2. Iodine rich

  3. Magnesium deficient

  4. Magnesium rich
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The process of growth and development is regulated by thyroxine hormone which is produced by thyroid gland. Iodine is required for thyroxine production. That is why retarded growth is seen in tadpoles living in iodine deficient water. 

Multiple choice

Which of these is true about seals?

  1. They are vegetarian.

  2. They can sleep in the water.

  3. They eat both meat and plants.

  4. They are native to the Gulf of Mexico.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Seals are marine mammals that are capable of sleeping in the water, often by bobbing vertically or resting on the surface. They are carnivores, not vegetarians, and are found in various oceans globally rather than being limited to the Gulf of Mexico.

Multiple choice zoology adaptation terrestrial adaptation in animals terrestrial adaptations animal adaptations terrestrial adaptations in plants adaptation in terrestrial plants

In the given list. How many animal are Ammonotelic?
Aquatic insect, bony fish, frog, Birds, reptiles, spiders, marines bony fish, crocodiles

  1. Four

  2. Three

  3. Five

  4. Two
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ammonotelic animals are those that excrete nitrogenous waste primarily as ammonia. This typically includes aquatic insects, bony fish, and some amphibians (like tadpoles). In the list, aquatic insects, bony fish, and marine bony fish are definitely ammonotelic; the classification of others varies, but four is the standard answer in this context.

Multiple choice evs snakes a snake charmer's story snakes and snake charmers uses of animals

Which of the following snake is poisonous?

  1. Cobra

  2. Krait

  3. Afai

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Venomous or poisonous snakes are species capable of producing venom (poison), which is used primarily for immobilizing prey and defense. It is mostly done via mechanical injection by fangs. The varieties of snake that most often cause serious snakebites depend on the region of the world. 
Africa- Mambas, Egyptian cobras, Puff adders and Carpet vipers
Middle East- Carpet ipers and Elapids
Central and South America- Bothrops and Crotalus 
In South Asia- Indian cobras, Common kraits, Russell's viper, Saw-scaled vipers (Afai snake) and Carpet vipers
So, the answer is D.