fish
Insects are not a species. Insects are are a class of invertebrates within the arthropod phylum. That is like asking if mammals are the most numerous species. Your question needs to be refined. Are you asking if insects are the most numerous class of animal? Most numerous species of living thing? Or perhaps you are thinking of a specific species such as monarch butterfly (Danausplexippus).
Fish species
Osteichthyes, the bony fish class, has over 30,000 species.
Fish hold the title for the most numerous vertebrates on Earth. With over 30,000 known species, they are found in a wide range of aquatic environments worldwide.
It is a declarative sentence.
The degree of comparison is superlative.
The positive degree of comparison is used. (That it, no comparison is made.)
The most numerous types of plants are the Xerophyta Viscosa, the broccoli plant, the lilac, the zucchini plant, the blue bell, and the yew bush.
The most complex and intelligent vertebrate is generally considered to be humans. Human intelligence is characterized by advanced cognitive abilities such as problem-solving, language, reasoning, and self-awareness, which surpass those of all other vertebrate species.
Pizza
Yes, insects are often considered the most numerous group of organisms on Earth in terms of species diversity. It's estimated that there are around 1 million described insect species, with potentially millions more awaiting discovery. Insects are found in almost every ecosystem, playing crucial roles in various ecological processes.
planet