- capric acid aka decanoic acid has ten carbons [MP 31°C]
- caprylic acid = chain 8 C long [MP 16°C]
- caproic acid = chain 6 C long [MP -4°C]
All three of these goaty fatty acids are "saturated" - all the carbons are fully charged with hydrogens. Saturation and length both contribute to solidifying the acids and their compounds. The melting points in the list above imply a linear relationship between chain length and MP, but it's more complicated than that with acetic acid being solid at roomish temperature. Unsaturated fats have double bonds between some of the carbons making them a bit more flexible and less viscous. For completeness, I've mentioned SCFAs in a takedown about the number of diets which depend more on assertion than evidence. SCFAs have fewer carbons in the side chain: formic C; acetic CC; proprionic CCC; butyric CCCC [as in butter]; valeric CCCCC.
Mammal milk is widely different in fat content, let alone exactly what fatty acids are present, and there is some evidence that MCFAs are anti-fungal and/or pre-biotic - encouraging the growth of good gut bacteria. Capric acid is also found in plants; especially coconut [10%]. If you have a well-trained microbiome, then high fibre diets will naturally ferment to produce a) SCFAs and b) gas. If you are a) 12 years old b) a boy it is therefore acceptable to talk about short chain farty acids. Note kids are adorable.