Bulletin of the Kitakyushu Museum of Natural History and Human History, Series A (Natural History)
Online ISSN : 2435-7545
Print ISSN : 1348-2653
Special Issue on Coelacanths
The long-time adaptation of coelacanths to moderate deep water: reviewing the evidences
Camila CUPELLOGaël CLÉMENTFrançois J. MEUNIERMarc HERBINYoshitaka YABUMOTOPaulo M. BRITO
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RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS

2019 Volume 17 Pages 29-35

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Abstract

The evolutionary history of coelacanths is long and complex with indications of adaptations to different aquatic environments. Fossil coelacanths are registered in shallow brackish, fresh or marine waters, while extant coelacanths inhabit moderate deep marine environments. Here we review some evidences of this long-time adaptation to moderate deep waters, focusing mainly on the hypothesis of bimodal respiration (gas exchange through gills and lungs) in most fossil coelacanths and on the aquatic gas exchange and the presence of a non-functional lung in the extant coelacanth Latimeria chalumnae. Another morphological evidence is the high rate of lipid accumulation in the whole body of L. chalumnae.

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