Plankton (Sapphirina sp.)is an invertebrate copepod marine (saltwater) or freshwater animal. An invertebrate is soft-bodied, without bones.
The King of the Plankton is the Sapphirina genus, one of the most abundant zooplankton. It looks like a transparent (see-through) insect, with an oval body, several segments, two antenna, simple eyes, and small tail-like segments.
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Toadstool Coral (Sarcophyton sp.) is a marine invertebrate animal that looks like a toadstool mushroom.
Corals are in the phylum Cnidaria, and the class Anthozoa. Corals are divided into three sub-classes: Hexacorallia, Octocorallia, and Ceriantharia. Toadstool Coral is in the Octocorallia sub-class – the soft corals.
Toadstool Coral usually has a rounded trunk (base or stem) that is firmly attached to a rock or substance (it cannot move – it is sessile). On top of the trunk is a round, flat cap called a capitulum. The capitulum can be ruffled or folded. Numerous individual polyps (tentacles) arise from the capitulum, which wave back and forth in the ocean currents. The polyps can retract within the capitulum at night and come out during the day.
Brain Coral (Diploria labyrinthiformis) is also known as Grooved Brain Coral. Corals are in the phylum Cnidaria, and the class Anthozoa. Corals are divided into three sub-classes: Hexacorallia, Octocorallia, and Ceriantharia. Brain Coral is in the Hexacorallia sub-class, and in the genus Diploria. It is a marine invertebrate (without a backbone). It is an animal (not a plant).
Brain Coral is a stony or hard coral. It looks like the human brain. It is hemispherical and can be brown, yellow, or grey. It has deep valleys and long snake-like ridges.