Dear Authors,

This study is small but brilliant piece of work of experimental research of foraminifera. The authors culture two common species under well-controlled environmental conditions. During this culture experiments, the authors find a couple of new results. The results are worth to publish on BG after making minor revision according to reviewers comments.

In addition, could you please evaluate how your culture experimental works are adoptable to natural populations if possible. Every time, we should consider how laboratory experiments get biased results from nature. It sometimes show artificial phenomena in ecological, physiological and morphological points of view.

Hiroshi Kitazato

Dear Julia and co-authors,

I read through your revision according to two reviewers and my comments. the article is enough matured to publish on BG.

Congratulations,

Hiroshi Kitazato