It’s always interested me why it is difficult to detect young juvenile stages of some fish species too. Grow fast or get eaten in the open ocean and as my explanation for marlin
Even funnier, the standard term in the older literature is "cow-calf pairs" for blue whales (and other whales). I'm using mother-calf instead in my paper.
Comments
(I'm sorry)
Congrats on the paper - Friday acceptances are always nice, doubly so in December!