To give you an idea of the scope of #MOBS onlinelibrary.wiley.com/doi/10.1111/.... There are 52,505 species of marine Mollusk, MOBS has body size data for 46,110 of them (88%).
onlinelibrary.wiley.com
MOBS 1.0: A Database of Interspecific Variation in Marine Organismal Body Sizes
Motivation Body size is a fundamental trait influencing an organism's life history, ecology, physiology and evolutionary dynamics. While extensive body-size databases exist for terrestrial vertebrat...