How many sea creatures start with M?

14 of the 209 sea creatures in Icillion start with M, for example Manatee, Mussel and Monk seal.

What is the longest name among sea creatures that start with M?

The longest is “Melon-headed whale” and the shortest is “Murex”.

Nature · lists

14 sea creatures start with M, from “Manatee” to “Mussel”. Every one of them counts as an answer in Icillion.

M is the 4th most common first letter in this list: 14 of the 209 sea creatures (7%).
Shortest: “Murex”. Longest: “Melon-headed whale”.
10 names have more than one word.
3 can be spelled more than one way, and all the spellings count.

How many sea creatures start with M?: 14 of the 209 sea creatures in Icillion start with M, for example Manatee, Mussel and Monk seal.
What is the longest name among sea creatures that start with M?: The longest is “Melon-headed whale” and the shortest is “Murex”.

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Seven prompts a day, twenty seconds each. Obvious answers float on the tip of the iceberg; rare ones sink all the way to the trench.