WebBiological filtration is the process in which ammonia, which comes from fish waste and is highly toxic to fish, is converted to nitrite (also toxic to fish) then to nitrate by beneficial, nitrifying bacteria. Nitrate is far less toxic to fish, except in extremely high levels. This process is known as nitrification. Filters WebMar 31, 2024 · fish, any of approximately 34,000 species of vertebrate animals (phylum Chordata) found in the fresh and salt waters of the world. Living species range from the primitive jawless lampreys and hagfishes through the cartilaginous sharks, skates, and … Class Actinopterygii (ray-finned fishes), in existence since the Early Devonian, is … Fish are a kind of animal that lives in water. Fish have lived on Earth for more than … lungfish, (subclass Dipnoi), any member of a group of six species of living air … bony fish, (superclass Osteichthyes), any member of the superclass Osteichthyes, … mosquito, (family Culicidae), any of approximately 3,500 species of familiar … Ken Hammond/U.S. Department of Agriculture. The word fish is often used … The whale shark (Rhincodon typus) and the basking shark (Cetorhinus maximus), … reptile, any member of the class Reptilia, the group of air-breathing vertebrates … amphibian, (class Amphibia), any member of the group of vertebrate animals … skate, (order Rajiformes), in zoology, any of numerous flat-bodied cartilaginous …

Coral - National Geographic Society

WebBiological. Explore aquatic diversity, focusing on the structure, function, and evolutionary connection between organisms. Table of Contents. Biological. Representative Image. ... Fish are some of the most recognizable aquatic organisms in both freshwater and marine habitats. Topics Include: Introduction to Fish. WebMay 20, 2024 · Marine ecosystems are aquatic environments with high levels of dissolved salt, such as those found in or near the ocean. Marine ecosystems are defined by their unique biotic (living) and abiotic (nonliving) factors. Biotic factors include plants, animals, and microbes; important a biotic factors include the amount of sunlight in the ecosystem ... how many days to see washington dc

Fish Definition, Species, Classification, & Facts Britannica

WebDec 3, 2024 · The Basics. Jellyfish, also known as jellies, are fascinating animals that spend their lives floating in the oceans. Unlike their name suggest, jellyfish are not really fish as they lack a backbone. In fact, these animals are actually invertebrates and they are more closely related to corals, sea anemones, and sea whips than fish. WebApr 5, 2024 · Out in the azure waters and colorful corals of the Maldives, a resplendent, rainbow-hued fish has become the first to be named and described by a Maldivian researcher. New to science, the rose-veiled fairy wrasse ( Cirrhilabrus finifenmaa) is named in the local Dhivehi language. Finifenmaa means “rose” and is a tribute to the islands ... WebThe ‘immortal’ jellyfish, Turritopsis dohrnii. To date, there’s only one species that has been called ‘biologically immortal’: the jellyfish Turritopsis dohrnii. These small, transparent animals hang out in oceans around the world and can turn back time by reverting to an earlier stage of their life cycle. The life cycle of ... how many days to see zion np