Metridium is capable of both sexual and asexual reproduction. In sexual reproduction, the eggs and sperm are released into the water and form planula larvae after fertlization occurs (Hoffmann 1986). Individuals that live deeper and are continuously submerged are able to grow to larger sizes, which increases feeding efficiency and gamete production (Bucklin 1987). Sexual reproduction is more likely to occur in these individuals because of this.Asexual reproduction is acheived through pedal laceration, which produces clones of the individual (Hoffmann 1986). This is most common in intertidal individuals that cannot grow as large, possibly because of limited food and feeding time in addition to damage by wave action. Since these individuals can reproduce asexually, it allows for reproduction and growth despite their smaller body size (Bucklin 1987).
Members of the genus Metridium, also known as plumose anemones, are sea anemones found mostly in the cooler waters of the northern Pacific and Atlantic oceans. They are characterized by their numerous threadlike tentacles extending from atop a smooth cylindrical column, and can vary from a few centimeters in height up to one meter or more. In larger specimens, the oral disk becomes densely curved and frilly.
The following species are recognised in the World Register of Marine Species (WoRMS):[1]
Members of the genus Metridium, also known as plumose anemones, are sea anemones found mostly in the cooler waters of the northern Pacific and Atlantic oceans. They are characterized by their numerous threadlike tentacles extending from atop a smooth cylindrical column, and can vary from a few centimeters in height up to one meter or more. In larger specimens, the oral disk becomes densely curved and frilly.
