Planarians (triclads) are free-living flatworms of the class Turbellaria, [2] [3] order Tricladida, [4] which includes hundreds of species, found in freshwater, marine, and terrestrial habitats. [5] Planarians are characterized by a three-branched intestine, including a single anterior and two posterior branches. [ 5 ]

There are many different species that inhabit freshwater, marine and terrestrial ecosystems. Planaria are flatworms in the phylum Platyhelminthes with amazing regeneration abilities giving them the title 'immortal under the edge of a knife'.

Jul 1, 2020 · Marine planarian species dwell on the bottom of tidal or subtidal zones of the ocean. Aquatic and semi-aquatic forms frequent streams and spring pools, while others are found in flowing mountain streams. Terrestrial species are found in moist habitats under stones, logs, and stems of aquatic plants mostly in the tropics and subtropics.

Planarian, any of a group of widely distributed, mostly free-living flatworms of the class Turbellaria (phylum Platyhelminthes). The name planarian is used to designate any member of the family Planariidae and related families. Most planarians live in fresh water; some species are marine, while others are terrestrial.

Feb 17, 2015 · Planarians—free-living flatworms found around the world in terrestrial, marine, and freshwater environments—are fascinating organisms with an interesting natural history ... and a rather...

Oct 2, 2024 · Discover effective strategies for identifying and removing planaria from your aquarium, ensuring a healthy environment for your aquatic friends. As someone who’s really into reef tanks, I understand how vital it is to keep everything in balance.

Mar 12, 2025 · Red planaria only get to about two millimeters, so generally need small predators to notice them. One of the most effective of these predators doesn't often get the credit it deserves, but Springer's Damsel and Melanesian Blue Damsel are …

Marine planarians, or Maricola, have a world-wide distribution. Marine Planarians of the World™ presents a comprehensive account of the anatomy, ecology, and distribution of all known species of marine planarians, including text descriptions, line drawings and micrographs.

Mar 5, 2025 · Planarian worms have been a source of frustration for aquarists for many years. This guide will cover what they are, and how you can get rid of them.

Feb 2, 2025 · Planaria are a diverse group of free-living flatworms in the class Turbellaria, known for their range of colors, sizes, and head shapes. The commonly used species in classrooms and laboratories include Girardia tigrina (brownish), Planaria maculata (blackish), and …