Marine animals have diverse life cycles depending on their species and ecological niche. Here are some common life cycle patterns observed in marine animals:
Oviparous – Producing young by means of eggs which after they have laid by the parent.
Viviparous- Give birth to live young.
Ovoviviparous – Once the egg hatches, it remains inside the mother for a period of time.
Metamorphosis – Change of physical form, structure, or sub

Here are some sea animals that lay eggs and don’t lay egg’s. I completed this chart to show the different animals and their life cycle patterns.
This is the lifecycle of a turtle .
These are some fun facts about hawksbill turtle’s.