They have gills for a while
I know it's kinda...WEIRD but they/we do.
If you think that's weird listen to this:
A week or so before someone is born they have a full coat of hair all over them. It all falls of and they eat it along with dead skin e.g. and they poop...still in their mom's...
I hope your not eating now...
nope
yes, humans
They all have organs and a heart and pump blood
A starfish. or sex fish
They both need oxygen to survive.
intestine, stomach, mouth
fish coral reef star fish lobsters and many other things
Both have gills when they're embryos
Embryos from both species have gills
Yes, If another fish was to eat the star fish whilst underwater then the star fish would die.
The sun is a giant star and has always been there. Triton was made by humans and launched into space. They gave nothing in common.
they all need water to live so that they dont dry out
star fish are food