Kim Hyun-Tae
Department of Science Education, Jeonju National University of Education, Jeonju, 55101, Republic of Korea.
Appl Microsc. 2023 Oct 31;53(1):10. doi: 10.1186/s42649-023-00093-6.
The purple spaghetti-eel Moringua raitaborua lives on the sandy or muddy bottoms of estuaries, which are subject to rapid and wide changes in salinity, pH, and osmoregulatory and hypoxic conditions due to the influx of organic materials from sources of freshwater. The species has adapted to hypoxic environments by developing a thicker epidermis with stratified polygonal cells, club cells, two types of mucous cells (goblet and, oval cells), stratified cuboidal cells and dermis with abundant blood capillaries. Among them, histological modification of thinner dorsal, lateral, and ventral body skin to include abundant capillaries and well-developed dermal vascularization may provide cutaneous respiration, permitting survival in brackish waters with low levels of oxygen and variable environmental parameters.
紫线蚓鳗（Moringua raitaborua）生活在河口的沙质或泥质底部，由于淡水来源的有机物质涌入，这些区域的盐度、pH值、渗透调节和缺氧状况会迅速发生大幅变化。该物种通过发育出一层更厚的表皮来适应缺氧环境，这层表皮包含分层的多边形细胞、棒状细胞、两种黏液细胞（杯状细胞和椭圆形细胞）、分层的立方体细胞以及具有丰富毛细血管的真皮。其中，较薄的背侧、外侧和腹侧身体皮肤的组织学改变，使其包含丰富的毛细血管和发达的真皮血管化，这可能为皮肤呼吸提供条件，从而使其能够在氧气含量低且环境参数多变的咸淡水中生存。
