plural nouns- multiple or different kinds?

0I found out that in some cases plural of a noun means different kinds/types rather than multiple.02br
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00For example, 02br
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00Humans have more than 600 muscles. => muscles here means different kinds of muscles02br
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00Another example is squid(s). Squid and squids are both plurals but squids is generally refering to different species of squid.02br
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00I'm worried that for nouns that I'm not familiar with, I might use them incorrectly, as online dictionaries do not explain which context plural nouns refer to. I believe most plural nouns refer to multiple case but there are exceptions.02br
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00Are there any resources that provide this distinction?02br
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00Thanks!0-