This species is presumed to prefer warmer water temperatures than Mola mola (in Sanriku coast of Japan, this species occur at sea surface temperatures of 16.8-25.6°C, average 19.9°C (vs. 11.5-25.6°C, average 17.7°C when Mola mola appeared in the area). The maximum recorded weight of 2,300 kg applies to a 272 cm TL female caught off the coast of Kamogawa, Japan by a set net .
This species is distinguished from its congeners by the following characters: head profile with bump (specimens >162.5 cm TL); chin with enlarged bump (>135.0 cm TL); rectangular body scales on the middle region of the body (shape developing with age, final shape not established on specimens 162.5 cm TL; rounded clavus (usually not wavy and without indents), supported by 14-24 (mode 17) clavus fn rays and 8-15 (12) ossicles .: short and / or deep; Cross section: compressed.
Behavioural data for Bumphead sunfish is currently being reviewed.
Diet information for Bumphead sunfish is currently being compiled.
Reproduction data for Bumphead sunfish is currently being compiled.
Marine; pelagic-oceanic; depth range 0 - 480 m . Subtropical distributed in the world’s oceans except for the polar regions.
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