Cornet fish underwater photo by TheLivingSea.com on Flickr.

Via Flickr:
The red cornet fish is one of only four species of its kind found throughout tropical and subtropical marine environments. They belong to the order Syngnathiformes which include the seahorse and pipefish. The cornet fish is often encountered on the reef where it is seen stalking its prey. Numerous smaller males can often be seen swimming alongside a larger female cornet fish. The males will shake their bodies in an attempt to court with the female. Cornet fish can reach a length of over 5 feet!

While most corals grow as colonies in tropical waters, the Devonshire cup coral (Caryophyllia smithii) is solitary and lives in temperate parts of the ocean. It grows with its cup-shaped skeleton attached to a rock or even a shipwreck. When the tentacles are expanded, these tiny corals look just like anemones, with each tapering, transparent tentacle ending in a small knob. Devonshire cup coral often occurs in a variety of corals from white or orange.

(Photo source)

Diamondback Tritonia (Tritonia festivia)

…a species of Tritoniid nudibranch which occurs in the northeast Pacific, ranging from south-central Alaska to northern Baja California. It is also known from Japan as well. Like other members of the family Tritoniidae diamondback Tritonia are predators and will feed on sessile animals like soft corals, gorgonians, and other anthozoans. The frontal veil of Tritonia festiva is very sensitive and is used to locate polyps that are not retracted. If located T. festivia will swiftly lunge int other colony and bite off the polys before the can contract into cover. 

If threatened T. festiva can escape from predators like sea stars by swimming upwards. 

Classification

Animalia-Mollusca-Gastropoda-Tritonoidea-Tritoniidae-Tritonia-T. festiva

Image: Daniel Hershman

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