well fish are sexual creatures. with sexual parts. they are not asexual but sexual, which means that two fish have intercourse, well maybe 3 if for fun. then come baby fish and that is their relationship.
silver fish
an alligator and fish
sharks and the little fish that suck parasites off of them
Atlantic porkfish have symbiotic relationships with many fish in the ocean. They eat the parasites that they find on other fish.
lichens, angler fish, vermiform appendix of ruminants.
Clown fish and sea anemone; the clown fish isn't stung by the anemone and makes its home in the anemone while when the clown fish is eating the anemone gets all the leftovers
Ictheologists study fish, including their behavior, physiology, ecology, and conservation. They focus on understanding the diverse species of fish and their relationships with their environment.
There is no known species of fish that rides sharks. Sharks are apex predators and do not typically form symbiotic relationships with other fish in that way.
clownfish and anemone, hermit crab and anemone, and some types of fish clean other fish to eat their dead scales and parasites.
Sometimes they eat the meal (Insects) and sometimes they are the meal. Fish eat Frogs.
An ichthyologist is a scientist who studies fish. Their work involves researching the behavior, anatomy, physiology, and distribution of fish species, as well as their relationships with their environment. They may also be involved in conservation efforts to protect fish populations and their habitats.
sea turtles have friendly relationships with other sea turtle species, and frock