▁but ▁generally ▁pos es ▁no ▁serious ▁threat . ▁It ▁is ▁up ▁to ▁ ▁in ▁bell ▁diameter , ▁but ▁a ▁more ▁typical ▁size ▁is ▁ ▁in ▁diameter ▁and ▁ ▁in ▁weight . ▁Its ▁colour ▁is ▁variable ▁and ▁can ▁be ▁blue - white , ▁cre am , ▁brown , ▁or ▁off - white . ▁The ▁ex um bre ll ar ▁gro ov es ▁are ▁re dd ish ▁or ▁pur pl ish ▁brown . ▁C . ▁tag i ▁has ▁g on ads ▁along ▁the ▁edge ▁of ▁its ▁st om ach ▁in ▁a ▁X ▁shape . ▁It ▁has ▁the ▁oct ant ▁formation ▁typical ▁of ▁Cat ost yl us ▁jel lies , ▁the ▁height ▁of ▁the ▁oct ants ▁are ▁also ▁variable . ▁ ▁Food ▁E ats ▁both ▁zo op l ank ton ▁and ▁ph y top l ank ton , ▁certain ▁cr ust ace ans , ▁small ▁fish , ▁and ▁marine ▁snow . ▁ ▁Bi omed ical ▁use ▁Its ▁bell ▁col lagen ▁is ▁currently ▁being ▁research ed ▁for ▁use ▁as ▁a ▁inter cell ular ▁matrix . ▁The ▁col lagen ▁is ▁made ▁up ▁of ▁ 1 / 3 ▁g ly c ine ▁and ▁the ▁most ▁of ▁the ▁rest ▁is ▁water ▁and ▁other ▁am ino ▁ac ids , ▁its ▁am ino ▁acid ▁content ▁is ▁very ▁small . ▁The ▁col lagen ▁is ▁den ature d ▁as ▁soon ▁as ▁it ▁reaches ▁. ▁ ▁References ▁▁ ▁Bol to v sky , ▁T ., ▁Bern ardo ▁Ab ia hy , ▁Viv iana ▁A . ▁Ald er , ▁Martin ▁V . ▁Angel , ▁Ren ate