A rotifer is a heterotroph.
All animals are! To qualify as an autotroph, an organism must be able to make its own sugars and other organic substances from inorganic substances. Green plants can do this, and some bacteria have various ways of doing it, but no animal can.
Heterotroph
heterotroph
heterotroph
The viper-fish is a heterotroph.
heterotroph
Heterotroph
Heterotroph.
heterotroph
heterotroph.
Heterotroph.
Heterotroph
heterotroph
Autotroph
there autotroph