I have some doubts in Evolution theory as well
There is too much of a difference between animals to just say animals just changed from one animal to other
Looks like an animal which would like in Drifting Ocean Clouds in Space and someone would pick it up and drop it in ocean for resembelence
Looks like group of creatures picked up in Jars across the Galaxy
New Visitor recently droppedin Indonesia
Collection of creatures picked up from dry Planets
Sea is filled with unlimited number or variation from Galactic samples
Plants
If Earth like planets are abundant but located at Huge galactic distances (umimaginable)
Certain Intelligent life form would find it with in reason to take samples fromone dying system and relocate few thousand copies across to a new freshly born system which still has 5-6 Billion years to live
Somtimes when the Sanctuary needs to have many smaller size creatures , certain dangerous (Gigantic size) creatures are removed from the system
If we were to able to send an observation probe /camera on robot across galaxy , these crafts would all be constructed with energy particles and not metal or bolts this would be true for civilization who can't physically travel across large distances