**Conflict of interest**

The authors declare no conflict of interest.

### **Author details**

Atanas Arnaudov\* and Dessislava Arnaudova Plovdiv University "P. Hilendarski", Plovdiv, Bulgaria

\*Address all correspondence to: arny87@abv.bg

© 2022 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

*Erythrocytes and Hemoglobin of Fish: Potential Indicators of Ecological Biomonitoring DOI: http://dx.doi.org/10.5772/intechopen.107053*
