The alkaline body surfaces of the loach protect from ammonia toxicity by volatilizing ammonia during aerial exposure.

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"The loach Misgurnus anguillicaudatus is unusual in that it tolerates very high ammonia levels in its tissues, but in turn these high levels, together with alkaline body surfaces, permit a significant ammonia excretion by volatilization during aerial exposure." (Tsui et al. 2002:659)

Journal article
Accumulation of ammonia in the body and NH3 volatilization from alkaline regions of the body surface during ammonia loading and exposure to air in the weather loach Misgurnus anguillicaudatusTsui, T. K. N.; Randall, D. J.; Chew, S. F.; Jin, Y.; Wilson, J. M.; Ip, Y. K.

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