organisms (without backbones) greater than 1 mm (.04 inches) long that can typically be seen with the naked eye.
Animals without backbones that can be seen with the naked eye. Includes insects, crayfish, snails, mussels, clams, fairy shrimp.
by practical definition those aquatic invertebrates generally visible to the unaided eye and retained by a U.S Standard No. 30 sieve (0.59 mm mesh opening).
(3) large or exceptionally prominent animals that lack a spinal column.
A broad term used to refer to invertebrates large enough to be seen with the naked eye.
include crayfish and mussels.
Animals without backbones that are large enough to be seen without a microscope.
Invertebrate animals (animals without backbones) large enough to be observed without the aid of a microscope or other magnification.
animals without backbones, generally visible with the naked eye and associated with freshwater systems.
Animals that lack backbones (invertebrates) and are large enough to be seen with the naked eye (macro.) Includes insects, crustaceans (such as crayfish), mollusks (clams, mussels, and snails), and worms. They are good indicators of water quality because the most sensitive can only survive in areas of high water quality.
Small animals, able to be seen with the naked eye, that do not have a backbone.
Invertebrates with a body greater than 1 mm that is, that can be seen with the naked eye.
larger aquatic organisms without skeletal structures such as snails, insect larvae and adults, crayfish, and crustaceans.
Animals that have no backbone and are visible without magnification
an animal without a backbone visible to the naked eye or larger than 0.5 millimeters.
Animals without backbones that are big enough to see with the naked eye. Examples include most aquatic insects, snails and crayfish.
Organisms with no backbone but are large enough to see with the unaided eye.
animals without backbones ("invertebrates") that are large enough to be seen with the naked eye ("macro"). Examples of macroinvertebrates include: crayfish, snails, clams, aquatic worms, leeches, and the larval and nymph stages of many insects, including dragonflies, mosquitoes, and mayflies. Macroinvertebrates are excellent indicators of water quality because they cannot move to a different section of water if the water they are in is uninhabitable.
Aquatic invertebrate animals that live on or in the surface of the substrate of streams or lakes.
aquatic insects, worms, clams, snails, and other animals without backbones that can be seen without the aid of a microscope and that may be associated with or live on sediments.
Insects large enough to see with the naked eye that live under rocks in the bottoms of streams.
small, spineless creatures that are visible with the unaided eye; they include organisms such as crustaceans, mollusks, worms, and insects.
organisms without a backbone that are large enough to be seen with the unaided eye.
