Final answer:
The desired sequence of sea creatures starts with tardigrades, proceeds to sea urchins, then sea cucumbers, and would end with sea monkeys, although sea monkeys were not part of the original list.
Step-by-step explanation:
To order the given sea creatures in the desired sequence, we need to start with tardigrades, followed by sea urchins, then sea cucumbers, and finally, sea monkeys. Tardigrades, also known as water bears, are known for their incredible resilience and can survive extreme environmental challenges. Sea urchins are echinoderms with no arms but have rows of tube feet for movement. Sea cucumbers, related to sea urchins, are elongate and have tube feet as well, with some modified into tentacles for feeding. Sea monkeys, which are actually brine shrimp and not part of the list provided, are also small invertebrates that can be found in salt lakes.