There are species that have no aging - Hydra for example - कुछ नस्लों की उम्र नहीं बढ़्ती - जैसे कि हाइड्रा -
2.
Hydra (constellation) जलसर्प तारामंडल
परिभाषा
small tubular solitary freshwater hydrozoan polyp
trouble that cannot be overcome by a single effort because of its many aspects or its persistent and pervasive quality; "we may be facing a hydra that defies any easy solution"