The present study indicates that the phytochemicals derived from M. oleifera seeds extracts are effective mosquito vector control agents and the plant extracts may be used for further integrated pest management programs.

The present investigation has revealed that positive progresses in the fish mucus extracts against human pathogens and hemolytic activity. But further efforts are required for the purification and isolation of the active antimicrobial compounds in order to establish their possible applications.

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Specimens of the pufferfish Arothron hispidus collected at Parangipettai, on the southeast coast of India, were subjected to bacterial isolation and identification. Three species were identified, namely Bacillus sp., Kytococcus sedentarius and Cellulomonas fimi. Partially-purified microbial filtrates exhibited hemolytic activity on chicken and human erythrocytes of O, B and AB blood groups, with maximum activity of 32 HU. The microbial filtrates also presented ATPase, Mg

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The high toxic sea anemones may also contain some biologically active agents which has haemolytic, analgesic and anti-infilamatory activity.

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The classes Ophiuroidea (Brittle stars) and Asteroids (sea stars) belonging to phylum, Echinodermata are characterized by their toxic saponins content. The aim of the present observation was to study the antimicrobial, hemolytic and cytotoxic properties of crude extracts from Ophiocnemis marmorata. The antimicrobial activity of ethanol extract showed maximum zone of inhibition against Staphylococcus aureus (7.0 mm) followed by 5.0 mm inhibition against Escherichia coli and 4 mm against Vibrio parahaemolyticus and Salmonella typhi. Hemolytic activity was high in goat blood (128 HU) in methanolic extracts. Thin layer chromatography indicates the presence of steroidal compounds in the crude sample. The brine shrimp lethality assay showed maximum mortality at 100% for of 93.6 and 95% ethanol extracts and minimum amount of mortality was noticed at 20% concentration. The regression analysis showed LC 50 value of 55.3% in ethanol and 56.3% in methanol extract. Therefore, it is concluded in the present investigation that the steroidal related compounds present in crude extract were responsible for the cytotoxicity activity.