In the word intrahepatic, the prefix intra- means the liver.

In the word intrahepatic, the prefix intra- means with in the liver.
The prefix intra means within or inside.
There are prefixes ans suffixes we use before and after the words. Prefixes are used before words and suffixes are used after words. some examples of prefixes are intra-, inter-, un- etc. And some exampls of suffixes are -er, -ish, -able, etc

the reason the two sea urchins don't compete with each other for food, resources, etc. is because the urchins have adapted to the environment but they have also adapted to each other. this is most likely because the genes of the sea urchins.

the organisms are not adapted to live in some communities or habitats.