There are many different species of large black beetles each with their own unique scientific name. Using a field guide or speaking to an entomologist would be places to start identifying a beetle.
There is no scientific name for just big fish.
They are a big shiny black beetle with long Antennas ( that is were the name long horned beetle comes from) they can grow to be 16 cm long (6.3 inches)
The scientific name is Tiburonia granrojo
The scientifis name for the big horned sheep is Ovis canadensis.
The Bigtooth Aspen's scientific name is Populus grandidentata.
The hallus
The colon.
The accepted scientific name is Pachysphinx modesta.
The goliath beetle is the biggest beetle.
The scientific or taxonomic name would be Andropogon gerardii.
Photinus pyralis is the common name for the big dipper firefly.
Felinology.