A taxonomic group within a classification of fish, specifically pertaining to certain types of fish with fused bones in their head.

संधि विविधता

English Usage: The synentognathi play an important role in aquatic biodiversity.

Hindi Usage: संधि विविधता जल पारिस्थितिकी में एक महत्वपूर्ण भूमिका निभाती है।