Yes, there are still unfound (new to us) species of fish that many scientist have not yet seen. The Mariannas Trench is too deep for us to remain in for long periods of time. Only some of the existing fishes of the world have been discovered so far.
See the related link below for more info on that leopard.
invasive species
No, the Hoki (Macruronis Novaezealandiae) is not a shellfish but a species of fish related to the cod. It is New Zealand's most important commercial fish species.
No, there are thousands of species of fish.
As of this year, there are over 28,000 species of fish. However, new species of fish are being discovered every year and this number is constantly increasing.
There are well over 24,000 (and counting) species of fish known to science.
Class Pisces, commonly known as fish, comprises over 32,000 species, making it one of the most diverse groups of vertebrates. This class is further divided into three main groups: jawless fish (Agnatha), cartilaginous fish (Chondrichthyes), and bony fish (Osteichthyes). The exact number of species can vary as new species are discovered and classifications are updated.
The fish's inability to survive and reproduce in the new environment, lack of suitable habitat, presence of natural predators or competitors, or effective management strategies such as early detection and rapid response programs would likely prevent it from becoming an invasive species.
The word species is the singular and the plural form; a species of fish, many species of fish.
No, Flying fish are not an endangered species at this time
There are well over 24,000 (and counting) species of fish known to science.
there are exactly 158 different species there are exactly 158 different species
Some fish species produce eggs and some fish species give birth to live baby fish.