The world of freshwater fish is full of fascinating and little-known species. One of the most interesting is the Vieja del Agua ( Hypostomus commersoni ), a fish that stands out for its unique appearance and lifestyle. Also known as the Vieja Negra, Limpiavidrios, or Cascudo , this species belongs to the Loricariidae family and is found in various regions of South America.
Main features of the Old Woman of Water
The Old Woman of the Water is a fish with an unmistakable appearance. Its body is covered in bony plates that serve as a defense against predators. These plates form a kind of armor, giving it a prehistoric appearance that makes it unique among freshwater fish.
Some of its most outstanding features are:
- Size: In its natural habitat it can reach up to 50cm lengthIn captivity, its growth may depend on the space available in the aquarium.
- Coloration: His body is of dark tones, between black and dark brown, with some variations in the ventral part.
- Differential fins: His fin dorsal is spinous and pronounced, while its ventral fin is larger than anal fin.
- Specialized mouth: Has suction cup mouth, with two whiskers or barbels that function as sensors, ideal for detecting food at the bottom of the water.
This fish is not very active and usually remains still for long periods, which allows it to conserve energy and easily catch its prey.
Habitat and distribution
The Vieja del Agua is a freshwater fish that inhabits rivers and lagoons in South America. It is found in places such as:
- Parana River
- Uruguay River
- Río de la Plata
- Third River in Cordoba
It prefers warm, moderately flowing waters where the bottom is rich in organic matter. It is a benthic fish, meaning it spends most of its time on the bottom, foraging and taking refuge among submerged rocks and logs.
Nutrition and eating habits
The Old Woman of the Water is an omnivorous fish , but its diet leans more towards detritivoring . This means it feeds on decaying matter , microorganisms, and small invertebrates from the bottom of the water.
- Consume mojarras, shads, boguitas and catfish.
- Also ingests organic sludge loaded with organic matter.
- In aquariums, it can be fed with Granules, tablets and vegetables.
Its suction-cup mouth allows it to adhere to surfaces and scrape algae and organic debris, which is why it is known as a glass cleaner in the aquarium hobby.
Reproduction of the Old Lady of the Water
Their reproduction is quite peculiar. The female lays the eggs in a cavity located under the lower jaw of the male, who is responsible for protecting the eggs until they hatch.
- The eggs are cared for intensively by the male.
- The fry receive protection even after they are born, which increases their chances of survival.
This behavior makes the Old Waterfish one of the species with the greatest parental instinct among freshwater fish.
Aquarium care
Due to its size and dietary requirements, the Old Water Fish is not an easy fish to keep in small aquariums. If you wish to include it in your aquarium, you should consider the following:
- Aquarium size: A tank of at least 1000 litres is recommended. 200 liters due to its growth and territorial behavior.
- Water quality: It is essential to keep the water clean with a good filtration system.
- pH and temperature: The ideal range of pH is 6.5 to 7.5, and the temperature should be kept between 24 ° C and 28 ° C.
- Aquarium decoration: It is recommended include aquatic plants, logs and stones so that he can take shelter.
Is it advisable to have a Water Old Lady as a pet?
While it's a fascinating fish, it's important to consider that it's not ideal for beginners , as its size and needs can be challenging. Furthermore, being a territorial fish, it may not be compatible with smaller or more peaceful fish.
Recommendations:
- Only keep it in aquariums large and well equipped.
- Do not mix with small or long-finned fish.
- Provide a balanced diet to avoid health problems.
Although its appearance may not be the most striking to some, the Old Woman of the Water is a valuable species for the ecosystem , as it helps to clean the bottom of rivers and aquariums.
With proper care and sufficient space, this fish can live between 10 and 15 years , making it an interesting addition for aquarium enthusiasts.
Beyond being a peculiar fish, the Vieja del Agua plays a fundamental role in the ecosystems where it lives. Its incredible adaptability and unique behavior make it a species worthy of study and admiration.