Question

Can you give me a name? Solve each of the following riddles by writing the name of the organism and its mode of nutrition.
I live in water; people keep me in an aquarium and feed me. ______, _______.

Answer 1

The organism which fits in this riddle is gill-bearing aquatic craniate animals that don't have limbs with digits. They are an important resource for humans worldwide, especially as the food source.

Complete solution:
Fish live underwater in the aquarium. Fishes feed on other organisms as they are heterotrophs. A heterotroph is a term that was given to a type of organism that cannot manufacture its own food by fixation of carbon and therefore derives its intake of nutrition from the other sources of organic carbon, mainly plant or animal matter present in the surrounding. In the food chain, the heterotrophs are put at secondary and tertiary consumers.
A fish that is characterized by the presence of bone tissues is known as Bony fish and they are also known as Osteichthyes. Most of the fishes belong to this taxonomic order and divided into two subgroups i.e Actinopterygii (ray-finned) and Sarcopterygii (lobe-finned).
-Fishes that are characterized by the presence of cartilage are known as cartilaginous fish and divided into two subgroups i.e. Elasmobranchii and Holocephali.
-More than approx 21,000 species of fishes are present in the world belonging to the class Chordata of the superclass Pisces.
-Based on this category fishes are classified as either Osteichthyes or Chondrichthyes
(bony fish or cartilaginous fish).

Note:
Their very unique fish present in nature is remora fish. Remora were also commonly known as the suckerfish which uses it’s a sucker to attach to objects or animals like a shark for transportation, food, etc. It is present in a single number that helps in the movement of the fishes by attaching to others.