Biology · General Awareness

Aquatic and Marine Biology

1,834 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

Radial symmetry is best seen in

  1. Fishes

  2. Jelly fish

  3. Star fish

  4. Sponges
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Radial symmetry is basically the regular arrangement of body parts around a central axis.

Multiple choice

Culture of marine fin fish is called

  1. Mariculture

  2. Pisciculture

  3. Aquaculture

  4. None
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pisciculture is fish farming which is a type of aquaculture. Mariculture is also a type of aquaculture done in ocean.

Multiple choice

If more than a single species of fish is cultured at a time, then it is called

  1. monoculture

  2. aquaculture

  3. polyculture

  4. mariculture
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fish polyculture means cultivating various species of fish together by fully using all water level food available in the pond and increasing fish production in the highest stage. The fish species which don’t contest with each other for food and habitat are suitable for polyculture.

Multiple choice

Snails show movement.

  1. slow and wavy

  2. fast and wavy

  3. crawling

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

Snail is an animal which is having outer skeleton called shell or the lid. It has a foot made of strong muscles. It is a very slow moving animal with a wavy motion.

Multiple choice

Which organ of the fish helps to change body direction and acts as a balancer?

  1. Gills

  2. Flat fins and tail

  3. Streamlined body

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

The body of a fish is well adapted to swim in water. They have got a streamlined body to cut the currents of water, gills in fish helps it to respire well in water. Also it is able to swim in water without sinking down due to the presence of flat fins and tail which help the fist in maintaining balance and in changing body direction.

Multiple choice

Heart of a fish is special because

  1. it has no blood at all

  2. it has arterial blood only

  3. it has venous blood only

  4. it has partly arterial and partly venous blood
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Heart of a fish is special because it has venous blood only as they have a closed-loop circulatory system.

Multiple choice

The shape of fish is streamlined to

  1. Increase fluid friction

  2. Facilitate breathing

  3. Change the direction

  4. Decrease fluid friction
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The shape of fish is such that to reduce fluid friction to ensure smooth motion.