view of giant black water beetle (hydrophilus triangularis) from lower side (ventral view).

wide water underwater undefined tropics trips triangularis tadpoles surfacing supply store snails small sidewalks scavenger scavenge rain predator pool ponds plant oxygen north night nature narrow material lighted larvae largest invertebrates insects hydrophilus hydrophilids hydrophilidae head hairs giant fresh frequent forests fish family exchange elongated distribution deep decaying debris bubble body black beetle aquatic antennae animal america air adaptation