When Pfiesteria are phototrophs they make their own food and are at the bottom of the food chain, but when they are heterotrophs they prey on fish and are on top of the food chain.
(Pfiesteria; are; phototrophs) (they; are; on top of the food chain) (they; make; their own food; T:When Pfiesteria are phototrophs) (they; are; at the bottom of the food chain) (they; are; heterotrophs they prey on fish and are on top of the food chain) (they; prey; on fish)
Pfiesteria they they they they they
are are make are are prey
phototrophs
on top of the food chain
their own food T:When Pfiesteria are phototrophs
at the bottom of the food chain
heterotrophs they prey on fish and are on top of the food chain
on fish