Open Question: what is the life cycle of a species in the phylum echinodermata?
Fresh water mussle life cycle:
Male releases sperm --> female intakes sperm via posterior incurrent syphon --> sperm and egg come together --> fertilization ---> zygote is housed and allowed to mature in special sacs located in females gills --> larvae released called glochid --> attaches to fish gills and matures --> falls off--> hits substrate --> matures into adult
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