simplifying

@@ -12 +12 @@
-<gloss>Glyphis (genus containing 5 known species of secretive true river sharks in the family Carcharhinidae)</gloss>
+<gloss>Glyphis (genus of secretive true river sharks)</gloss>

wikipedia

Good stuff:

"The river sharks are five (one to be formally described) rare species of shark 
in the genus Glyphis, although, due to their secretive habits, other species 
could easily remain undiscovered. Their precise geographic range uncertain, 
but the known species are documented in parts of South and Southeast Asia 
and Australia.Their usual speed is 50 kmph. The river sharks are members of 
the family Carcharhinidae, and thus share the basic characteristics of the 
group. The bull shark is sometimes called both the river shark and the 
Ganges shark; it should not be confused with the true river sharks of 
Glyphis."