Catfish farming offers strong potential for community economic growth. Catfish are resistant to various water conditions so that many people cultivate this fish. Just like other fish farming, the disease is the biggest obstacle in catfish farming. Changes in fish haematology in response to stress agents are indicators of the stress stage of fish, yielding useful information for curbing unfavourable conditions that can affect fish health. This study aimed to determine the haematological conditions of catfish in three different locations scattered in Tuban Regency as an indicator of fish health. The method used was descriptive by observing Erythrocytes, Leukocytes, Hemoglobin, and Hematocrit at 3 locations, namely in Tegalagung Village (a), Jenggolo Village (b), and Campurejo Village (c). The results of the erythrocyte at all locations were (a) 540,000 cells/mm3, (b) 1,980,000 cells/mm3, and (c) 1,690,000 cells/mm3. The results of the leukocyte count at all locations showed that (a) 301,000 cells/mm3, (b) 545,500 cells/mm3 and (c) 276,000 cells/mm3. Hemoglobin observations showed at the location (a) 16 g%, (b) 10.1 g% and (c) 10.8 g%. Hematocrit observation results showed at locations (a) 14%, (b) 13% and (c) 15%. Based on those results, it shows that catfish are in abnormal conditions. It is concluded that hematological parameters are outside the normal fish limits.

Fish need a decent environment for their life and livelihood. Types of fish that have different respiratory organs such as catfish can survive in extreme water conditions. However, in order to grow and develop naturally in a cultured environment, they need optimum water quality. This study aimed was to determine the quality of water in catfish aquaculture ponds in three partner locations for Community Service activities in Tuban Regency, East Java. The method used in this research is descriptive, with 3 points of location for water sampling, namely, in Jenggolo Village (A), Tegalagung Village (B), and Campurejo Village (C), Tuban Regency. The results of the study showed that the highest temperature in the pond in Campurejo Village was 30.2 ºC. The highest pH in the pond in Tegalagung Village is 7.59. The highest dissolved oxygen in the pond in Jenggolo Village was 13.4 mg L-1. The highest nitrate level was in the pond in Tegalagung Village, namely, 25 mg L-1. The highest phosphate content in the pond in Tegalagung Village. Furthermore, the highest Total Ammonia Nitrogen (TAN) levels are in the pond in Tegalagung Village, which is 16.6 mg L-1. Based on the results, the water quality parameters were classified as great. However, some parameters are less than optimal at different locations. Water quality management needs to be developed to optimize the growth of catfish.