The Hypostomus plecostomus, also known as the suckermouth catfish, is a tropical freshwater fish belonging to the armored catfish family. Its body and head are covered with bony plates. Regarding your observation of no identifiable organ structure and a mass of brownish liquid, it's important to note that alcohol can have significant effects on the organs of organisms. Alcohol is known to distribute throughout most fluid compartments of the body, leading to cell injury in nearly every tissue. Specifically, heavy alcohol use can interfere with normal nutrition, resulting in overall malnutrition or deficiencies of important micronutrients, by reducing their absorption or increasing their loss. This could potentially explain the rapid disintegration of the organs you observed. However, it's also worth noting that the process of decay can begin shortly after death, and environmental factors such as temperature can accelerate this process. Therefore, it's possible that the organs had already begun to break down before the specimen was placed in alcohol. So both the alcohol and the natural decay process could have contributed to the state of the organs you observed. It would be beneficial to consult with a biologist or a specialist in fish anatomy for a more accurate assessment. Please remember that this is a general explanation and may not fully cover all aspects of your observation.

Thank you for your information and interest. I know that I should of been prepared to place a specimen in preservation.

James