What are the differences between terrestrial and marine invertebrates?

Terrestrial just means that they are on the land, whereas marine invertebrates tend to include those that stay within the water fully (unless you get into species like crabs or turtles which go in and out).

Can you define your question to be more precise by chance? Like are you looking for care difference, or size, or if you can keep them inside of an aquarium or not easily?