Depending on the food chain you look at, plankton or the sun.
Phytoplankton capture the energy from sunlight through photosynthesis. The sun is the ultimate source of energy, but it is not an actual member of a food chain or web. Phytoplankton are at the beginning of the ocean food chain or web.
The open ocean food chains are made up of different things. It starts as phytoplankton then zooplankton then the fish and the dolphins and sharks
garf
Plankton
If the number of phytoplankton decrease the food chain would decrease in the ocean.
The role of the sun in the ocean food chain is .... there is some plants in the ocean so, it give the plants food and some animals eat the plants and you know the rest.
Phytoplankton
Goldfish and bettas (fighting fish) are freshwater fish, so they are not part of the ocean's food chain at all. In a freshwater environment, they are relatively low on the food chain.
the relationship between ocean circulation patterns and the marine food chain is they have almost the same conditions
A food chain in the euphotic zone of the open ocean begins with phytoplankton, to zoo-plankton, or other filter feeders (sardines, shell fish; i.e. primary consumers), then secondary consumers, and finally tertiary consumers like game fish or humans.
A marine food chain is a chain in the ocean of things that eat things that eat other things and so on...
The ocean food chain
yes
ALGEA
phytoplankton
The protein-rich Southern Ocean is so rich because the food chain there is abundant. The food chain is short, and for months out of the year the ocean is frozen over, which removes some of the larger predators from the food chain.