Sessile filter feeders like this Carboniferous crinoid, were significantly less abundant after the extinction. Source: Vassil / Wikimedia Commons
https://commons.wikimedia.org/wiki/File:Agaricocrinus_americanus_Carboniferous_Indiana.jpg
Sessile filter feeders like this Carboniferous crinoid, were significantly less abundant after the extinction. Source: Vassil / Wikimedia Commons
https://commons.wikimedia.org/wiki/File:Agaricocrinus_americanus_Carboniferous_Indiana.jpg