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Too many Janitor Fish
Do you know what a Pterygolichthys is?
Well it's the scientific name for Janitor fish.
This fish is an invasive species.
An invasive species is a plant, animal, fungus, or bacterium that is not native and has a negative impact on the native ecosystem or enviroment.
These fish are native to Brazil, Argentina, Ecuador and Peru from the Orinoco and Amazon rivers. They are medium to moderately large catfish, generally measuring from 40 to 55 cm long. They have a body armor and most have dark color. They also have a distinctive dorsal sail fin with 9 to 14 rays.
This fish can have a potentially negative effect on the environment or native ecosystem.
Bank alteration of structure and erosion,disruption of acuatic food chains, competitions with native spicies, mortality of endangered shore birds, changes in acuatic plant comunities, and damage to fishing gear an industries.
This fish go lay down in the bottom and they bury their tails and this behavior can reduce the abundace of beds of submersed aquatic vegetation, and this creates floating mats that don't let sunlight go to the beneath.
There are not so many solutions been done, but there are some. There is solution been done in the Philippines that is to catch as much janitor fishes as you can and bury them alive. But they are now working to find a use for Janitor fish like cosmetics, bio diesel, etc.
The Janitor fish is an invasive species brought to different parts of the world because, aquarium trade and their release or escape in Bangladesh, Guatemala, Guyana, Hawaii, India, Mexico, Panama, Indonesia, Japan, Java, Malaysia, Peru, Philippines, Puerto Rico, Singapore, Taiwan, Thailand, Trinidad, and the U.S.
So if you have a Janitor Fish please don't let it free.
By: Daniela Esrada, Javier Urrea, Joe Pivaral y Marcela Porras